A compact 340 GHz 2x4 patch array with integrated subharmonic gilber core mixer as a building block for multi-pixel imaging frontends
Paper i proceeding, 2014

For linear multi-pixel imaging systems, a linear stack of pixels comprising of an antenna and a heterodyne receiver are needed. Such pixels can be realized using MMIC processes. The main constraint for such multi-pixel system is a compact array of pixels giving high coupling to quasi-optics used for focusing. This paper addresses this trade-off and presents a novel solution based on beam synthesis of two consecutive subarrays. One such sub-array along with heterodyne receiver is described as half-pixel in this paper and it is realized using 2x4 patch array and Gilbert core sub-harmonic mixer using a 250nm DHBT process. The patch array has ohmic loss better than 8 dB and mixer conversion loss is 6-8 dB over 320-350 GHz RF band. The chip size is 1mm x 2mm and therefore for 7 simultaneous beams a MMIC of 8 half-pixels is foreseen.

Gilbert Core

Gaussian Coupling

Patch Array

Sub-Harmonic Mixer

HBT

Författare

Yogesh Karandikar

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Herbert Zirath

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Yu Yan

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Vessen Vassilev

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Technical Digest - IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC

1550-8781 (ISSN)

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/CSICS.2014.6978533

ISBN

978-147993622-9