Slot Array Antennas at V-band based on Inverted Microstrip Gap Waveguide
Licentiate thesis, 2017

Recently, gap waveguide technology is introduced as a proper guiding structure for millimeter-systems. The conception of gap waveguide technology can be modeled for theoretical analysis by two parallel plates, a top perfect electric conductor layer and a bottom perfect magnetic conductor layer. This structure stops all modes propagating in all directions except for a quasi-TEM mode when the gap between perfect electric conductor and perfect magnetic conductor plates is smaller than quarter wavelength at an operating frequency. Until now there are already four different visions of this novel conception-groove, ridge, inverted microstrip and microstrip ridge gap waveguides. Among those four structures, the inverted microstrip gap waveguide has same obvious advantages. First of all, it has a uniform bed of nails while the others do not. This uniform pin structure makes the fabrication much easier and cheaper. Secondly, fabrication of microstrip circuitry on PCB by etching is accurate and very low cost. In addition, theories and design principles of microstrip technologies are very well-developed. Therefore, my work in this Lic. thesis is focusing on the theory of inverted microstrip gap waveguide and its applications on millimeter wave array antenna design.

inverted microstrip gap waveguide

metallic pins

perfect magnetic conductor

slots array and variational method

EE Classroom Chalmers University of Technology
Opponent: Eva Rajo-Iglesias


Jinlin Liu

Chalmers, Signals and Systems, Communication and Antenna Systems, Antennas

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

International Symposium on Antennas and Propagation (ISAP),; (2016)

Paper in proceedings

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

2016 Global Symposium on Millimeter Waves, GSMM 2016 and ESA Workshop on Millimetre-Wave Technology and Applications, Espoo, Finland, 6-8 June 2016,; (2016)p. 131-134

Paper in proceedings

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

10th European Conference on Antennas and Propagation, EuCAP 2016,; (2016)

Paper in proceedings

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

2016 International Symposium on Antennas and Propagation (ISAP),; (2017)p. 760-761

Paper in proceedings

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

IEEE Transactions on Antennas and Propagation,; Vol. 65(2017)p. 2117-2122

Journal article

Areas of Advance

Information and Communication Technology

Subject Categories

Aerospace Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics


Chalmers University of Technology

EE Classroom Chalmers University of Technology

Opponent: Eva Rajo-Iglesias

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