Ashraf Uz Zaman

Senior Researcher at Chalmers, Electrical Engineering, Communication and Antenna Systems, Antennas

Ashraf Uz Zaman is an Associate Professorin the Antenna Systems research group.

Source: chalmers.se

Showing 119 publications

2019

Towards Integrated Active Antennas for 5G mm-wave Applications at Gapwaves

Carlo Bencivenni, Ashraf Uz Zaman, Abolfazl Haddadi et al
2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings, p. 415-416
Paper in proceedings
2019

A Method of Reducing Mutual Coupling Using an Extra Coupling Path

Lei Chen, Tianling Zhang, Sadegh Mansouri Moghaddam et al
13th European Conference on Antennas and Propagation, EuCAP 2019
Paper in proceedings
2019

An Unequal Power Divider Based on Ridge Gap Waveguide

Yu Quan, Jian Yang, Hao Wang et al
Proceedings of the European Conference on Antennas and Propagation
Paper in proceedings
2019

8 x 8 Ka-Band Dual-Polarized Array Antenna Based on Gap Waveguide Technology

Miguel Ferrando-Rocher, Jose Ignacio Herranz-Herruzo, Alejandro Valero-Nogueira et al
IEEE Transactions on Antennas and Propagation. Vol. 67 (7), p. 4579-4588
Journal article
2018

A Slot Array Antenna with Single-Layered Corporate-Feed based on Ridge Gap Waveguide in the 60-GHz Band

Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman et al
IEEE Transactions on Antennas and Propagation
Journal article
2018

Simple and Broadband Transition Between Rectangular Waveguide and Groove Gap Waveguide for mm-Wave Applications

Abbas Vosoogh, Ashraf Uz Zaman, Jian Yang
IEEE Antennas and Propagation Society International Symposium, p. 1101-1102
Paper in proceedings
2018

Millimeter wave Microstrip Fed Slot Array Antenna with PMC Packaging for Future 5G Systems

Ashraf Uz Zaman, Eva Rajo-Iglesias
2018 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING, p. 1513-1514
Paper in proceedings
2018

Capacitive-coupled groove gap waveguide filter

Morteza Rezaee, Ashraf Uz Zaman
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

140 GHz Planar Gap Waveguide Array Antenna for Line of Sight (LOS) MIMO Backhaul Links

Ashraf Uz Zaman, Sofia Rahiminejad, Thomas Eriksson et al
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

Bandwidth Investigation on Half-Height Pin in Ridge Gap Waveguide

Fangfang Fan, Jian Yang, Vessen Vassilev et al
IEEE Transactions on Antennas and Propagation. Vol. 66 (1), p. 100-108
Journal article
2018

An Integrated Ka-Band Diplexer-Antenna Array Module Based on Gap Waveguide Technology With Simple Mechanical Assembly and No Electrical Contact Requirements

Abbas Vosoogh, Milad Sharifi Sorkherizi, Ashraf Uz Zaman et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 66 (2)
Journal article
2018

Analytical Solutions towards Inverted Microstrip Gap Waveguide for Characteristic Impedance and Losses Based on Variational Method

Jinlin Liu, Jian Yang, Ashraf Uz Zaman
IEEE Transactions on Antennas and Propagation
Journal article
2018

Capacity Gains of (3 × 3)×(3 × 3) MIMO Fixed Links with Planar Aperiodic Sparse Arrays in Pure-LOS Channels

Andres Alayon Glazunov, Navid Amani, Ashraf Uz Zaman et al
Proceedings of the 2018 8th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2018, p. 734-736
Paper in proceedings
2018

A V-band branch guide 3-dB Coupler based on gap waveguide for use in antenna array

D. Zarifi, A. Farahbakhsh, Ashraf Uz Zaman
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

A compact phase shifter in groove gap waveguide for millimeter-wave applications

Seyed Ali Razavi, Ashraf Uz Zaman
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

A New Calibration Kit for VNA Measurements of General Microstrip Line Devices Using Gap Waveguide Technology

Julius Pettersson, Ashraf Uz Zaman, Jian Yang
2018 International Symposium on Antennas and Propagation (ISAP)
Paper in proceedings
2018

PCB Based UWB mm-Wave Smart Capped Bowtie Array for 5G Communication Systems

Jian Yang, Sadegh Mansouri Moghaddam, Ashraf Uz Zaman et al
IEEE Antennas and Propagation Society International Symposium, p. 631-632
Paper in proceedings
2018

A mmWave Wideband Slot Array Antenna Based on Ridge Gap Waveguide With 30% Bandwidth

Ali Farahbakhsh, Davood Zarifi, Ashraf Uz Zaman
IEEE Transactions on Antennas and Propagation. Vol. 66 (2), p. 1008-1013
Journal article
2018

Design of Wideband Slot Array Antenna by Groove Gap Waveguide in Millimeter Waves

Jinlin Liu, Ashraf Uz Zaman, Jian Yang
Paper in proceedings
2018

Millimeter wave high gain antenna based on gap waveguide technology

Ashraf Uz Zaman, Thomas Emanuelsson
2017 IEEE 6th Asia-Pacific Conference on Antennas and Propagation, APCAP 2017 - Proceeding, p. 1-3
Paper in proceedings
2018

A wideband high-gain and high-efficiency slot array antenna based on groove gap waveguide

A. Farahbakhsh, D. Zarifi, Ashraf Uz Zaman
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

Design of A Wideband Array Antenna Prototype with Gap Waveguide for W-Band Wireless Links

Jinlin Liu, Ashraf Uz Zaman, Jian Yang
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

Gap waveguide technology for millimeter-wave antenna systems

Eva Rajo, M. Ferrando-Rocher, Ashraf Uz Zaman
IEEE Communications Magazine. Vol. 56 (7), p. 14-20
Journal article
2018

W-Band Low-Profile Monopulse Slot Array Antenna Based on Gap Waveguide Corporate-Feed Network

Abbas Vosoogh, Abolfazl Haddadi, Ashraf Uz Zaman et al
IEEE Transactions on Antennas and Propagation. Vol. 66 (12), p. 6997-7009
Journal article
2018

A Planar Single-Polarized Ultra-Wideband Antenna Element for Millimeter-Wave Phased Array

Sadegh Mansouri Moghaddam, Jian Yang, Andres Alayon Glazunov et al
2018 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP)
Paper in proceedings
2018

Gap waveguide based 1-D steerable beam antenna concept for millimeter-wave 5G application

Ashraf Uz Zaman, Thomas Emanuelsson
IET Conference Publications. Vol. 2018 (CP741)
Paper in proceedings
2018

Zero-Gap Waveguide: A Parallel Plate Waveguide With Flexible Mechanical Assembly for mm-Wave Antenna Applications

Abbas Vosoogh, Ashraf Uz Zaman, Vessen Vassilev et al
IEEE Transactions on Components, Packaging and Manufacturing Technology. Vol. 8 (12), p. 2052-2059
Journal article
2017

Ridge gap waveguide slot antenna array with 30% bandwidth for 60-GHz applications

A. Farahbakhsh, D. Zarifi, Ashraf Uz Zaman
2017 11th European Conference on Antennas and Propagation, EUCAP 2017, p. 3050-3052
Paper in proceedings
2017

Millimeter wave wideband high gain antenna based on gap waveguide technology

Ashraf Uz Zaman, Andres Alayon Glazunov
2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Vol. 2017-January, p. 1-2
Paper in proceedings
2017

A High-Gain High-Efficiency Corporate-Fed Slot Array Antenna directly Fed by Ridge Gap Waveguide at 60-GHz

Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman et al
2017 International Symposium on Antennas and Propagation (ISAP)
Paper in proceedings
2017

Slot Antenna Array Unit Cell Directly Fed by Inverted Microstrip Gap Waveguide

Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman et al
2017 International Symposium on Antennas and Propagation (ISAP)
Paper in proceedings
2017

Pick and place assembly technique for fabrication of groove gapwaveguide resonator

Sadia Farjana, Ashraf Uz Zaman, Peter Enoksson
Journal of Physics: Conference Series. Vol. 922 (1)
Paper in proceedings
2017

A dual-polarized slotted-waveguide antenna based on gap waveguide technology

M. Ferrando-Rocher, Ashraf Uz Zaman, Jian Yang et al
2017 11th European Conference on Antennas and Propagation, EUCAP 2017, p. 3726-3727
Paper in proceedings
2017

Novel Low-Loss Millimeter- Wave Transition From Waveguide-to-Microstrip Line Suitable for MMIC Integration and Packaging

Ashraf Uz Zaman, Vessen Vassilev, Herbert Zirath et al
IEEE Microwave and Wireless Components Letters. Vol. 27 (12), p. 1098-1100
Journal article
2017

Millimeter wave contactless microstrip-gap waveguide transition suitable for integration of RF MMIC with gap waveguide array antenna

Uttam Nandi, Ashraf Uz Zaman, Abbas Vosoogh et al
2017 11th European Conference on Antennas and Propagation, EUCAP 2017, p. 1682-1684
Paper in proceedings
2017

A Wideband Contactless and Bondwire-Free MMIC to Waveguide Transition

Alhassan Aljarosha, Ashraf Uz Zaman, Rob Maaskant
IEEE Microwave and Wireless Components Letters. Vol. 27 (5), p. 437-439
Journal article
2017

A Ridge Gap Waveguide fed apperture-coupled microstrip antenna array for 60 GHz applications

D. Zarifi, A. Farahbakhsh, Ashraf Uz Zaman
2017 11th European Conference on Antennas and Propagation, EUCAP 2017, p. 953-955
Paper in proceedings
2017

Diplexer integration into a Ka-band high-gain gap waveguide corporate-fed slot array antenna

Abbas Vosoogh, Milad Sharifi Sorkherizi, Ashraf Uz Zaman et al
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting
Paper in proceedings
2017

Novel Millimeter Wave Transition From Microstrip Line to Groove Gap Waveguide for MMIC Packaging and Antenna Integration

Uttam Nandi, Ashraf Uz Zaman, Abbas Vosoogh et al
IEEE Microwave and Wireless Components Letters. Vol. 27 (8), p. 691-693
Journal article
2017

A GapWaveguide-Fed Wideband Patch Antenna Array for 60-GHz Applications

D. Zarifi, A. Farahbakhsh, Ashraf Uz Zaman
IEEE Transactions on Antennas and Propagation. Vol. 65 (9), p. 4875-4879
Journal article
2017

60-GHz Groove Gap Waveguide Based Wideband H-Plane Power Dividers and Transitions: For Use in High-Gain Slot Array Antenna

A. Farahbakhsh, D. Zarifi, Ashraf Uz Zaman
IEEE Transactions on Microwave Theory and Techniques. Vol. 65 (11), p. 4111-4121
Journal article
2017

Design and Fabrication of a High Gain 60-GHz Cavity-backed Slot Antenna Array fed by Inverted Microstrip Gap Waveguide

Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman et al
IEEE Transactions on Antennas and Propagation. Vol. 65 (4), p. 2117-2122
Journal article
2017

Realisation of carved and iris groove gap waveguide filter and E-plane diplexer for V-band radio link application

M. Rezaee, Ashraf Uz Zaman
IET Microwaves, Antennas and Propagation. Vol. 11 (15), p. 2109-2115
Journal article
2017

An E-band Antenna-diplexer Compact Integrated Solution Based on Gap Waveguide Technology

Abbas Vosoogh, Milad Sharifi Sorkherizi, Ashraf Uz Zaman et al
2017 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP 2017)
Paper in proceedings
2017

Wideband cavity-backed slot subarray with gap waveguide feed-network for D-band applications

Abbas Vosoogh, Ashraf Uz Zaman, Vessen Vassilev
2017 11th European Conference on Antennas and Propagation, EUCAP 2017, p. 207-209
Paper in proceedings
2016

Demonstration of a micromachined planar distribution network in gap waveguide technology for a linear slot array antenna at 100 GHz

Sofia Rahiminejad, Ashraf Uz Zaman, Sjoerd Haasl et al
Journal of Micromechanics and Microengineering. Vol. 26 (7), p. Art. no. 074001-
Journal article
2016

Micromachined Linear Slot Array Antenna for 100 GHz with 10 dB Gain Using GAP Waveguide Technology

Sofia Rahiminejad, Ashraf Uz Zaman, Sjoerd Haasl et al
10th European Conference on Antennas and Propagation (EUCAP 2016)
Paper in proceedings
2016

Mm-Wave contactless connection for MMIC integration in gap waveguides

Alhassan Aljarosha, Rob Maaskant, Ashraf Uz Zaman et al
2016 IEEE Antennas and Propagation Society International Symposium, APSURSI 2016, Fajardo, Puerto Rico, 26 June - 1 July 2016, p. 253-254
Paper in proceedings
2016

Different gap waveguide slot array configurations for mmwave fixed beam antenna application

Ashraf Uz Zaman, Per-Simon Kildal
10th European Conference on Antennas and Propagation, EuCAP 2016; Davos; Switzerland; 10 April 2016 through 15 April 2016, p. Art. no. 7481541-
Paper in proceedings
2016

Design of a double layer cavity backed slot array antenna in gap waveguide technology

Peiye Liu, Ashraf Uz Zaman, Per-Simon Kildal
21st International Symposium on Antennas and Propagation, ISAP 2016, Okinawa, Japan, 24-28 October 2016, p. 682-683
Paper in proceedings
2016

Design of 8 × 8 Slot Array Antenna based on Inverted Microstrip Gap Waveguide

Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman et al
2016 International Symposium on Antennas and Propagation (ISAP), p. 760-761
Paper in proceedings
2016

Optimizing the numerical port for inverted microstrip gap waveguide in full-wave simulators

Jinlin Liu, Ashraf Uz Zaman, Per-Simon Kildal
10th European Conference on Antennas and Propagation, EuCAP 2016
Paper in proceedings
2016

Corporate distribution networks for slot array antenna based on groove gap waveguide technology

A. Farahbakhsh, D. Zarifi, Ashraf Uz Zaman et al
10th European Conference on Antennas and Propagation, EuCAP 2016, Davos, Switzerland, 10-15 April 2016, p. Art. no. 7481157-
Paper in proceedings
2016

Design and Fabrication of a High-Gain 60-GHz Corrugated Slot Antenna Array With Ridge Gap Waveguide Distribution Layer

D. Zarifi, A. Farahbakhsh, Ashraf Uz Zaman et al
IEEE Transactions on Antennas and Propagation. Vol. 64 (7), p. 2905-2913
Journal article
2016

W-band spatial power combiner and splitter in gap waveguide technology

Waqar Ali Shah, Rob Maaskant, Ashraf Uz Zaman et al
2016 IEEE Antennas and Propagation Society International Symposium, APSURSI 2016, Fajardo, Puerto Rico, 26 June - 1 July 2016, p. 255-256
Paper in proceedings
2016

GAP waveguides

Ashraf Uz Zaman, Per-Simon Kildal
Handbook of Antenna Technologies. Vol. 4, p. 3273-3347
Book chapter
2016

Design of transition from WR-15 to inverted microstrip gap waveguide

Jinlin Liu, Ashraf Uz Zaman, Per-Simon Kildal
2016 Global Symposium on Millimeter Waves, GSMM 2016 and ESA Workshop on Millimetre-Wave Technology and Applications, Espoo, Finland, 6-8 June 2016, p. 131-134
Paper in proceedings
2016

Millimeter Wave E-Plane Transition From Waveguide to Microstrip Line With Large Substrate Size Related to MMIC Integration

Ashraf Uz Zaman, Vessen Vassilev, Per-Simon Kildal et al
IEEE Microwave and Wireless Components Letters. Vol. 26 (7), p. 481-483
Journal article
2016

A high gain ridge gap waveguide fed slot antenna array for 60 GHz applications

D. Zarifi, A. Farahbakhsh, Ashraf Uz Zaman et al
10th European Conference on Antennas and Propagation, EuCAP 2016; Davos; Switzerland; 10 April 2016 through 15 April 2016, p. Art. no. 7481703-
Paper in proceedings
2016

E-band 3-D metal printed wideband planar horn array antenna

Abbas Vosoogh, Per-Simon Kildal, Vessen Vassilev et al
21st International Symposium on Antennas and Propagation, ISAP 2016, Okinawa, Japan, 24-28 October 2016, p. 304-305
Paper in proceedings
2016

Spatial Power Combining and Splitting in Gap Waveguide Technology

Rob Maaskant, Waqar Ali Shah, Ashraf Uz Zaman et al
IEEE Microwave and Wireless Components Letters. Vol. 26 (7), p. 472-474
Journal article
2016

In memory of Professor Per-Simon Kildal

Arne Svensson, Jan Carlsson, John Conway et al
IEEE Antennas and Propagation Magazine. Vol. 58 (4), p. 116-117
Magazine article
2015

A groove gap Waveguide Iris Filter for V-band Application

Morteza Rezaee, Ashraf Uz Zaman, Per-Simon Kildal
23rd Iranian Conference on Electrical Engineering (ICEE), 2015, p. 462-465
Paper in proceedings
2015

A New 2x2 Microstrip Patch Sub-array for 60GHz Wideband Planar Antenna with Ridge Gap Waveguide Distribution Layer

Ashraf Uz Zaman, Per-Simon Kildal
9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015
Paper in proceedings
2015

V-Band Groove Gap Waveguide Diplexer

Morteza Rezaee, Ashraf Uz Zaman, Per-Simon Kildal
9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015, p. 1-4
Paper in proceedings
2015

Design of a Cavity-backed Slot Array Unit Cell on Inverted Microstrip Gap Waveguide

Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman et al
International Symposium on Antennas and Propagation (ISAP)
Paper in proceedings
2014

MICROMACHINED GAP WAVEGUIDE DEVICES FOR ABOVE 100 GHZ

Sofia Rahiminejad, Elena Pucci, Ashraf Uz Zaman et al
10TH MICRONANO SYSTEM WORKSHOP
Paper in proceedings
2014

60GHz Slot-Array Antenna Design Based on Gap Waveguide Cavity and Gap Waveguide Feed

Ashraf Uz Zaman, Per-Simon Kildal
Paper in proceedings
2014

Gap Waveguide PMC Packaging for Improved Isolation of Circuit Components in High-Frequency Microwave Modules

Ashraf Uz Zaman, Mats Alexanderson, Tin Vukusic et al
IEEE Transactions on Components, Packaging and Manufacturing Technology. Vol. 4 (1), p. 16-25
Journal article
2014

Prospective new PMC based gap waveguide shielding for microwave modules

Ashraf Uz Zaman, Eva Rajo, Per-Simon Kildal
IEEE International Symposium on Electromagnetic Compatibility, EMC Europe 2014; Swedish Exhibition and Congress CentreGothenburg; Sweden; 1 September 2014 through 4 September 2014, p. 459-463
Paper in proceedings
2014

Micromachined gap waveguide devices for above 100 GHz

Sofia Rahiminejad, Elena Pucci, Ashraf Uz Zaman et al
Swedish Microwave Days March 11-12, 2014
Paper in proceedings
2014

Wide-Band Slot Antenna Arrays With Single-Layer Corporate-Feed Network in Ridge Gap Waveguide Technology

Ashraf Uz Zaman, Per-Simon Kildal
IEEE Transactions on Antennas and Propagation. Vol. 62 (6), p. 2992-3001
Journal article
2013

Micromachined Groove Gap Waveguides for 100 GHz applications

Sofia Rahiminejad, Syed Hasan Raza Zaidi, Ashraf Uz Zaman et al
7th European Conference on Antennas and Propagation, EuCAP 2013, Gothenburg, Sweden, 8-12 April 2013
Paper in proceedings
2013

Linear slot array design in ridge gap waveguide technology

Ashraf Uz Zaman, Per-Simon Kildal
7th European Conference on Antennas and Propagation, EuCAP 2013, Gothenburg, Sweden, 8-12 April 2013
Paper in proceedings
2013

Ka-Band Gap Waveguide Coupled-Resonator Filter for Radio Link Diplexer Application

Esperanza Alfonso Alos, Ashraf Uz Zaman, Per-Simon Kildal
IEEE Transactions on Components, Packaging and Manufacturing Technology. Vol. 3 (5), p. 870-879
Journal article
2013

Micromachined gap waveguides for 100 GHz applications

Sofia Rahiminejad, Syed Hasan Raza Zaidi, Ashraf Uz Zaman et al
2013 7th European Conference on Antennas and Propagation, EuCAP 2013, p. 1935-1938
Paper in proceedings
2013

Packaging of MMIC by using gap waveguide and design of a microstrip to ridge gap waveguide transition

Ashraf Uz Zaman, Per-Simon Kildal
2013 3rd Asia-Pacific Microwave Conference, APMC 2013; Seoul; South Korea; 5 November 2013 through 8 November 2013, p. 10-12
Paper in proceedings
2013

SU8 Ridge Gap Resonator

Sofia Rahiminejad, Elena Pucci, Ashraf Uz Zaman et al
MEMSWAVE, 2013, Potsdam, Germany
Paper in proceedings
2013

Study of Q-Factors of Ridge and Groove Gap Waveguide Resonators

Elena Pucci, Ashraf Uz Zaman, Eva Rajo et al
IET Microwaves, Antennas and Propagation. Vol. 7 (11), p. 900-908
Journal article
2013

Design of a simple transition from microstrip to ridge gap waveguide suited for MMIC and antenna integration

Ashraf Uz Zaman, Tin Vukusic, Mats Alexanderson et al
IEEE Antennas and Wireless Propagation Letters. Vol. 12, p. 1558 - 1561
Journal article
2013

Ku band linear slot-array in ridge gapwaveguide technology

Ashraf Uz Zaman, Per-Simon Kildal
2013 7th European Conference on Antennas and Propagation, EuCAP 2013, p. 3078-3081
Paper in proceedings
2012

Numerical Prepackaging with PMC Lid - Efficient and Simple Design Procedure for Microstrip Circuits Including the Packaging

A. Kishk, Ashraf Uz Zaman, Per-Simon Kildal
Applied Computational Electromagnetics Society Journal. Vol. 27 (5), p. 389-398
Journal article
2012

Investigation of a Microstrip-to-Ridge Gap Waveguide transition by electromagnetic coupling

Astrid Algaba Brazalez, Ashraf Uz Zaman, Per-Simon Kildal
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), p. 1-2
Paper in proceedings
2012

Slot antenna in ridge gap waveguide technology

Ashraf Uz Zaman, Per-Simon Kildal
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012. Prague, 26-30 March 2012, p. 3243-3244
Paper in proceedings
2012

Design of a coplanar waveguide-to-ridge gap waveguide transition via capacitive coupling

Astrid Algaba Brazalez, Ashraf Uz Zaman, Per-Simon Kildal
Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012. Prague, 26-30 March 2012, p. 3524-3528
Paper in proceedings
2012

Narrow-Band Microwave Filter Using High-Q Groove Gap Waveguide Resonators With Manufacturing Flexibility and No Sidewalls

Ashraf Uz Zaman, Per-Simon Kildal, A. A. Kishk
IEEE Transactions on Components, Packaging and Manufacturing Technology. Vol. 2 (11), p. 1882-1889
Journal article
2012

Metamatrial based packaging method for improved isolation of circuit elements in microwave modules

Ashraf Uz Zaman, Mubarak Ellis, Per-Simon Kildal
7th European Microwave Integrated Circuits Conference, EuMIC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012; Amsterdam; Netherlands; 29 October 2012 through 30 October 2012, p. 834-837
Paper in proceedings
2012

Micromachined Ridge Gap Waveguide and Resonator for Millimeter-Wave Applications

Sofia Rahiminejad, Ashraf Uz Zaman, Elena Pucci et al
Sensors and Actuators, A: Physical. Vol. 186 (Special Issue: SI), p. 264-269
Journal article
2012

Bed of Springs for Packaging of Microstrip Circuits in the Microwave Frequency Range

Eva Rajo, Per-Simon Kildal, Ashraf Uz Zaman et al
IEEE Transactions on Components, Packaging and Manufacturing Technology. Vol. 2 (10), p. 1623-1628
Journal article
2012

Gap waveguide components for millimeter-wave systems. Couplers, filters, antennas, MMIC packaging

Esperanza Alfonso Alos, Ashraf Uz Zaman, Elena Pucci et al
International Symposium on Antennas and Propagation, ISAP 2012, Oct 29-Nov. 2 2012, Nagoya, Japan, p. 243-246
Paper in proceedings
2012

Micromachined Ridge Gap Waveguide and Resonator for 220-325 GHz

Sofia Rahiminejad, Ashraf Uz Zaman, Elena Pucci et al
Micronano Systems Workshop
Conference poster
2012

Improved Microstrip Filters Using PMC Packaging by Lid of Nails

Astrid Algaba Brazalez, Ashraf Uz Zaman, Per-Simon Kildal
IEEE Transactions on Components, Packaging and Manufacturing Technology. Vol. 2 (7), p. 1075-1084
Journal article
2011

New low loss inverted microstrip line using gap waveguide technology for slot antenna applications

Elena Pucci, Ashraf Uz Zaman, Eva Rajo et al
Proceedings of the 5th European Conference on Antennas and Propagation, EUCAP 2011. Rome, 11-15 April 2011, p. 979-982
Paper in proceedings
2011

Progress report on developing metamaterial EBG-based gap waveguide components and packaging solutions between 1 GHz and several 100 Ghz

Per-Simon Kildal, Ashraf Uz Zaman, Eva Rajo et al
URSI National Radio Science Meeting, Spokane, USA, 3-8 July, 2011
Paper in proceedings
2011

Micromachined ridge gap waveguide for sub millimeter and millimeter wave applications

Sofia Rahiminejad, Ashraf Uz Zaman, Elena Pucci et al
MME 2011: 22nd Micromechanics and Micro Systems Europe Workshop, June 19-22, 2011, Toensberg, Norway
Paper in proceedings
2011

Design and experimental verification of ridge gap waveguides in bed of nails for parallel plate mode suppression

Per-Simon Kildal, Ashraf Uz Zaman, Eva Rajo et al
IET Microwaves, Antennas and Propagation. Vol. 5 (3), p. 262-270
Journal article
2011

Design of Band-Pass Filter Using Gap Waveguide Technology

Ashraf Uz Zaman, Astrid Algaba Brazalez, Per-Simon Kildal
Millimetre Wave Days, 23-25 May 2011, Espoo Finland (6th ESA Workshop on Millimetre-Wave Technology and Applications and 4th Global Symposium on Millimeter Waves)
Paper in proceedings
2011

Design of Micromachined Ridge Gap Waveguides for Millimeter-Wave Applications

Sofia Rahiminejad, Ashraf Uz Zaman, Elena Pucci et al
Proc. Eurosensors XXV, September 4-7, 2011, Athens, Greece. Vol. 25, p. 519-522
Paper in proceedings
2011

Increasing parallel plate stop-band in gap waveguides using inverted pyramid-shaped nails for slot array application above 60GHz

Ashraf Uz Zaman, Vessen Vassilev, Per-Simon Kildal et al
Proceedings of the 5th European Conference on Antennas and Propagation, EUCAP 2011. Rome, 11-15 April 2011, p. 2254-2257
Paper in proceedings
2011

Improving microstrip filters with gap waveguide packaging

Astrid Algaba Brazalez, Ashraf Uz Zaman, Elena Pucci et al
Proceedings of the 5th European Conference on Antennas and Propagation, EUCAP 2011. Rome, 11-15 April 2011, p. 1080-1084
Paper in proceedings
2010

Validation of ridge gap waveguide performance using in-house TRL calibration kit

Ashraf Uz Zaman, Per-Simon Kildal, Mattias Ferndahl et al
EuCAP 2010 Fourth European Conference on Antennas and Propagation, Barcelona, 12-16 April 2010
Paper in proceedings
2010

Design of cryogenic 2-14 GHz Eleven feed for reflector antennas for future radio telescopes

Jian Yang, Miroslav Pantaleev, Per-Simon Kildal et al
Gigahertz Symposium 2010, Lund University, 9-10 March 2010
Paper in proceedings
2010

Packaging of microstrip circuits using gap waveguide approach

Eva Rajo, Ashraf Uz Zaman, Per-Simon Kildal et al
Gigahertz Symposium 2010, Lund University, 9-10 March 2010
Paper in proceedings
2010

Concept of gap waveguide and measured results for first demonstrator

Ashraf Uz Zaman, Per-Simon Kildal, Eva Rajo et al
Gigahertz Symposium 2010, Lund University, 9-10 March 2010
Paper in proceedings
2010

Using lid of pins for packaging of microstrip board for descrambling the ports of Eleven antenna for radio telescope applications

Ashraf Uz Zaman, Jian Yang, Per-Simon Kildal
2010 IEEE International Symposium on Antennas and Propagation, Toronto, July 11-17, 2010
Paper in proceedings
2010

Losses in ridge gap waveguide compared with rectangular waveguide and microstrip lines

Elena Pucci, Ashraf Uz Zaman, Eva Rajo et al
EuCAP 2010 Fourth European Conference on Antennas and Propagation, Barcelona, 12-16 April 2010
Paper in proceedings
2010

Q-factor comparisons between new gap waveguide technology and standard rectangular waveguide

Elena Pucci, Ashraf Uz Zaman, Eva Rajo et al
Gigahertz Symposium 2010, Lund University, 9-10 March 2010
Paper in proceedings
2010

Cryogenic 2-14GHz low noise receiver for radio astronomy using Eleven feed

Miroslav Pantaleev, Jian Yang, Per-Simon Kildal et al
Gigahertz Symposium 2010, Lund University, 9-10 March 2010
Conference contribution
2010

Cryogenic integration of 2-14 GHz Eleven Feed in wideband receiver for VLBI 2010

Miroslav Pantaleev, Jian Yang, Yogesh Karandikar et al
Sixth IVS General Meeting (International VLBI Service for Geodesy and Astrometry), February 7-13, 2010, Hobart, TAS, Australia, p. 415-419
Conference contribution
2009

Parallel plate cavity mode suppression in microstrip circuit packages using a lid of nails

Eva Rajo, Ashraf Uz Zaman, Per-Simon Kildal
IEEE Microwave and Wireless Components Letters. Vol. 20 (1), p. 31-33
Journal article
2009

Design of Transition from Coaxial Line to Ridge Gap Waveguide

Ashraf Uz Zaman, Eva Rajo, E. Alfonso et al
2009 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI 2009; North Charleston, SC; United States; 1 June 2009 through 5 June 2009
Paper in proceedings
2009

Design of Transitions and Calibration Kit in New Wideband Metamaterial-based Gap Waveguide Transmission Line Technology For Millimeter and Submillimeter Waves

Ashraf Uz Zaman, Eva Rajo, Elena Pucci et al
Joint 5th ESA Workshop on Millimetre Wave Technology and Applications and 31st ESA Antenna Workshop on “Millimetre and sub-millimetre waves - From technologies to systems”, 18 - 20 May 2009, ESTEC, Noordwijk, The Netherlands
Paper in proceedings
2009

Wideband, lowloss, low-cost, quasi-TEM metamaterial-based local waveguides in air gaps between parallel metal plates

Per-Simon Kildal, Eva Rajo, E. Alfonso et al
International Conference on Electromagnetics in Advanced Applications (ICEAA 2009), Torino, Italy, September 14-18, 2009. Vol. 1-2, p. 565-568
Paper in proceedings
2009

Alternative ridge gap waveguide design using a mushroom-type EBG surface

Eva Rajo, Ashraf Uz Zaman, E. Alfonso et al
IEEE AP-S International Symposium on Antennas and Propagation, Charleston, USA, June 1-5, 2009
Paper in proceedings
2007

Dual polarised microstrip patch antenna with high port isolation

Ashraf Uz Zaman, Lars Manholm, Anders Derneryd
Electronics Letters. Vol. 43 (10), p. 551-552
Journal article

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Showing 1 research projects

2017–2019

SmartBowtie: PCB/LTCC/Silicon Based UWB mm-Wave Smart Capped Bowtie Array Antenna for 5G Communication Systems

Jian Yang Antennas
Ashraf Uz Zaman Antennas
Zhongxia Simon He Microwave Electronics
Vessen Vassilev Microwave Electronics
VINNOVA

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