Novel Compact Coupler With Tunable Frequency, Phase Difference, and Power-Dividing Ratio

This letter proposes a novel compact coupler with simultaneously and continuously tuned frequency, output differential phase, and power-dividing ratio (PDR). In addition to multifunctionally tunable capabilities, this microstrip coupler is only one-tenth the size of the state-of-the-art coupler base...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 31; no. 10; pp. 1119 - 1122
Main Authors Chi, Pei-Ling, Shang, Shu-An, Yang, Tao
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2021
Subjects
Bandwidth
Capacitance
Compact
coupler
Couplers
Loss measurement
multifold control
tunable
Tuning
Varactors
Wireless communication
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Summary:This letter proposes a novel compact coupler with simultaneously and continuously tuned frequency, output differential phase, and power-dividing ratio (PDR). In addition to multifunctionally tunable capabilities, this microstrip coupler is only one-tenth the size of the state-of-the-art coupler based on the coupled-line structure. Coupler analysis and design equations will be provided with thorough discussion. The fabricated prototype achieved the frequency, differential phase, and PDR tuning ranges of 1.2-2.4 GHz, −64° to −112°, and 0-12 dB, respectively. Moreover, the same coupler can be reconfigured to be a 180° coupler with the measured frequency tuning range of 1.3-2 GHz and PDR tuning range of −8.3 to 11.1 dB.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2021.3105603