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

Ashraf Uz Zaman (Institutionen för signaler och system, Antenner) ; M. Alexanderson ; T. Vukusic ; Per-Simon Kildal (Institutionen för signaler och system, Antenner)
IEEE Transactions on Components, Packaging, and Manufacturing Technology (2156-3950). Vol. 4 (2014), 1, p. 16-25.
[Artikel, refereegranskad vetenskaplig]

In this paper, perfect magnetic conductor (PMC)-based packaging technique was used to improve the isolation performance among various microwave circuit components such as high-gain amplifier chains. In this approach, a periodic structure (such as metal pin rows) together with the ground plane of the substrate created a stopband for unwanted parallel plate or cavity modes as well as substrate modes, and thereby suppressed the problems of circuit resonances and related package phenomena. This paper describes two Ka-band amplifier chains that were tested with this new packaging technique. Firstly, a single amplifier chain was tested for maximum stable gain operation, and it was found that the stable gain of >65 dB was achieved, whereas traditional metal wall package with RF absorber offered stable gain of 40 dB, thus showing significant isolation improvement. Secondly, two high-gain amplifier chains were placed side by side and their mutual isolation was tested. With the proposed gap waveguide packaging, a minimum isolation of 78 dB was achieved, whereas a complete metal shield provided a minimum isolation of only 64 dB over the band of interest.

Nyckelord: Isolation, parallel-plate modes, PMC packaging, self-oscillation, stable gain, substrate modes, HIGH-SPEED CIRCUITS, ELECTROMAGNETIC BANDGAP, SUPPRESSION, MICROSTRIP, RESONANCE, LEAKAGE, SURFACES, DESIGN, NOISE, NAILS, DFORD TA, 1995, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, V43, P983



Denna post skapades 2014-02-06. Senast ändrad 2014-10-14.
CPL Pubid: 193539

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Antenner (2005-2014)

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur