期刊
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
卷 67, 期 10, 页码 4196-4205出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2019.2931560
关键词
Tuning; Couplings; Bandwidth; Resonant frequency; Patch antennas; Frequency measurement; Microwave filters; Microstrip filter; patch antenna; tunable filter
资金
- National Science Foundation (NSF) Graduate Research Fellowship Program [2016199887]
In this article, tunable integrated filter/antennas are demonstrated with two coupling configurations that provide design control of the bandwidth performance over the tuning range. The first is a single-layer third-order tunable filter/antenna with an increasing fractional bandwidth (FBW). The measured device has a frequency tuning range from 1.62 to 2.08 GHz, an FBW increasing from 3.0 to 4.8, and a gain increasing from 7.3 to 3.6 dBi. The second is a double-layer vertically integrated third-order tunable filter/antenna that provides a constant absolute bandwidth over the tuning range. This design accounts for the frequency-dependent behavior of the antenna radiation $Q$ . The constant absolute bandwidth device is tunable from 1.65 to 1.90 GHz, has a maximum bandwidth variation of 45.3 7.4 MHz over the tuning range, and exhibits a gain from 6.1 to 4.3 dBi.
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