MCM low-cost true time delay phase shifter

Avdjiiski, B.; Arnaudov, R.; Kostov, Ana

doi:10.1109/isse.2005.1490999

Cited by 3 publications

(2 citation statements)

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“…IFA has a convenient advantage to match impedance by the length between the feed-point and short circuit (SC) [2]. However, IFA, in general, is low gain and narrow bandwidth [3]. To improve the mentioned shortages, we apply two concepts.…”

Section: Introductionmentioning

confidence: 99%

Design and development of a broadband amplitude compensated long time delay circuit on thin‐film liquid crystal polymer

Chen

Zhang

Pham

et al. 2009

Micro & Optical Tech Letters

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and the effect of the finite ground which has not been included in the simulation procedure. The passband insertion loss is about 2.4 dB, which is mainly due to the conductor and dielectric losses of the substrate. The 3-dB bandwidth is 5.3%. Two transmission zeros at 0.97 GHz and 1.04 GHz are observed as expected. The out-of-band rejection is better than 31.5 dB at the lower stopband and 29 dB at the upper stopband. CONCLUSIONIn this article, a novel compact slow-wave open-loop resonator has been presented to build up fourth-order cross-coupled microstrip bandpass filter. Both theory and experiments are provided. The results demonstrate that the filter size can be extremely reduced by using the proposed resonator. The measured results are in good agreement with simulated predictions. In fact, besides the filter mentioned above, the compact slow-wave resonators can also allow various filter topologies to be realized. Using the proposed approach, it is possible to achieve a very compact arrangement and reduce the space needed for the integration of the filters in future wireless communication systems. ACKNOWLEDGMENTSThis present work was supported by Science and Technology Foundation for Youth of University of Electronic Science and Technology of China, JX0620. DESIGN AND DEVELOPMENT OF

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Section: Introductionmentioning

confidence: 99%

Design and development of a broadband amplitude compensated long time delay circuit on thin‐film liquid crystal polymer

Chen

Zhang

Pham

et al. 2009

Micro & Optical Tech Letters

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“…Phased array antennas require equal amplitude to provide controlled beam steering. Typical comparable circuits show up to 40 dB insertion loss, ±0.5 dB to ±2 dB amplitude imbalance, and 3 dB to 20 dB return loss [1][2][3][4]. LTDs generally suffer from 1) high insertion losses and 2) amplitude imbalance across different states.…”

Section: Introductionmentioning

confidence: 99%

Thin-film LCP amplitude compensated long time delay circuit

Chen

Zhang

Pham

et al. 2008

2008 IEEE MTT-S International Microwave Symposium Digest

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We present the design and development of an amplitude compensated long time delay circuit (LTD) in multilayer liquid crystal polymer (LCP) films. The design is implemented with MEMS switches. An LTD is built on a thin-film multilayer stack to provide a variety of transmission lines to offer different attenuation characteristics for amplitude compensation. True time delay (TTD) components produce 0 ps, 200 ps, 400 ps, and 600 ps relative delays. This part is intended to work over wide frequency ranges from DC to 10 GHz. Insertion loss mismatch between delays is measured to be less than ±0.4 dB across the band.Index Terms -Delay-lines, flexible structures, packaging, and phase shifter.

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