具有相位差可調性之雙頻等功率分配耦合器

Dual-Band Equal Power Division Coupler with Tunable Differential Phase

簡淳彬(Chun-Pin Chien)

指導教授 ： 紀佩綾

國立交通大學/電機學院/電信工程系所/碩士(2020年)

摘要

本論文為具有相位差可調性之雙頻等功率分配耦合器首次設計及實現出來，該耦合器使用四個控制電壓，八個變容二極體來控制耦合器的輸出相位差。在調整輸出相位差的情況下，該耦合器可以達到阻抗匹配及良好隔離度，且輸出功率保持在等功率輸出。
在實體電路量測結果，工作頻率為900 MHz與1800 MHz，輸出相位差可調整範圍為60 ̊~120 ̊。在此範圍內，最大傳輸損失約為0.81 dB，反射係數與隔離度皆小於-15 dB，功率分配比最大約為0.536 dB，且模擬與實際量測一致。

關鍵字

相位差可調 ； 等功率分配 ； 耦合器 ； 雙頻

並列摘要

In this thesis, a dual-band equal power division coupler with tunable differential phase is designed and implemented for the first time. This coupler uses four control voltage and eight varactors to control differential phase. For all tuning states, this coupler can theoretically realize perfect impedance matching and perfect isolation, and keeping equal power division.
Practically, the output differential phase can be tuned from 60 to 120 degree at the dual operating frequency 900 and 1800 MHz in measurement. In this range of output differential phase, the largest insertion loss reads about 0.81 dB, and both reflection coefficient and isolation are less than -15 dB. As for the largest power division reads about 0.536 dB. Measured and simulated results are in good agreement.

並列關鍵字

Tunable Differential Phase ； Equal Power Division ； Coupler ； Dual-Band

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