Millimeter-wave ultra-wideband bandpass filter based on liquid crystal polymer substrates for automotive radar systems
✍ Scribed by Xia Zhang; Johan Liu; Peng Cai; Camilla Kärnfelt; Xu Wang; Shiwei Ma; James Morris; Herbert Zirath
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 343 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A novel and compact millimeter‐wave microstrip ultra‐wideband bandpass filter working over 22–29‐GHz band based on liquid crystal polymer substrates for automotive radar systems is developed for the first time in this article. By using a dual‐mode ring resonator and novel parallel‐coupled input/output feed structure, an ultra‐wideband bandpass filter is realized. After optimization of the design and process, the filter is fabricated on liquid crystal polymer substrates using standard processing technology. Simulations and measurements are compared and discussed. The fabricated filter exhibits a return loss lever better than 20 dB, an insertion loss of 8 dB, and a 3‐dB bandwidth of 25%, which agreed well with simulated results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2276–2280, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23634