New design of X-band GaAs MMIC phase shifter using improved equivalent circuit model

Takasu, Hideki; Watanabe, Shigeru; Maeda, Masako; Miyauchi, M.; Kamihashi, S.; Ohtomo, M.

doi:10.1109/mwsym.1994.335146

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…However, type A consumes much area in microwave monolithic integrated circuit (MMIC) and requires PIN diode process, type B is poor in phase balance due to parasitic elements of FET or need specialized circuitry to compensate the phase imbalance, resulting in narrow bandwidth. Type C was supposed the most practical for MMIC implementation [1]. The SPDT switch is often combined with an inductor to improve on-off ratio.…”

Section: Introductionmentioning

confidence: 99%

A K-band bi-phase modulator MMIC for UWB application

Tokumitsu¹,

Oya²,

Piernas³

et al. 2005

IEEE Microw. Wireless Compon. Lett.

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A 24-GHz-band, three-dimensional microwave monolithic integrated circuit (MMIC) bi-phase modulator, that is a combination of an active 0 splitter and a SPDT switch, is proposed and demonstrated. Comparing conventional K-band bi-phase modulators, this modulator is broadband, significantly MMIC compatible, and shrinks its chip area. A fabricated bi-phase modulator exhibits an area of 1.0 0.7 mm 2 and a 1-dB bandwidth of nearly 10 GHz. The SPDT switch is optimized in control-gate's time constant so that a very clear bi-phase modulated waveform can be generated from 1 Gbps PN code. The insertion loss and the phase imbalance are 6.4 dB+ 0.6 dB and within 10 , respectively, between 22 GHz and 32 GHz.Index Terms-Active splitter, bi-phase modulator, microwave monolithic integrated circuit (MMIC), 1 Gbit/s.

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Section: Introductionmentioning

confidence: 99%