Extreme filtering applied to a microwave harmonic direction finding system

✍ Scribed by J-F. Zürcher

• Book ID: 102516430
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 115 KB
• Volume: 48
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.21506

✦ Synopsis

Abstract

A new harmonic direction finding (HDF) system, presented in [1], consists of a 2.45‐GHz transmitter with a +30‐dBm output power, a receiver at 4.9 GHz with a sensitivity better than −120 dBm, and a specially developed dual‐frequency helical antenna [2]. Besides high‐performance electronics, this system requires filters with extreme characteristics in order to avoid interferences between transmitter and receiver and filter out the harmonics of the transmitter. In this paper, various filter types are considered, simulated, realized, and measured. Only two types are found to be adequate for the application: a compact high‐pass filter made of a dielectric waveguide, and a stopband filter. The measured characteristics surpass the required ones. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 880–883, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21506