Design of compact bandpass cavity combline filter for satellite positioning receiver systems
✍ Scribed by Wu Weiwei; Feng Qi; Huang Jinjian; Yuan Naichang
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 236 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
In this article, the size of the cavity combline filter is greatly reduced by using capacitively loaded disks and reentrant combline resonators. It has low loss, high Q quality factor and wide stopband. The feasibility of this method is analyzed theoretically. The characteristics of the structure are studied by simulations. The size of the fabricated filter is almost 50% of the size of the conventional cavity combline filter. The measured S parameters of the two filters are given. At 1575 MHz, which is the operating frequency of the global positioning system receiver antijamming antenna array system, the inserted loss of the improved filter is 0.702 dB. To minimize the interference from the Bei‐Dou double star positioning system, at 1615 MHz, which is the operating frequency of this system, the out‐of‐band rejection of the improved filter at this frequency is 27.010 dB. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 910–913, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24191