X-Band Balanced Mixer by MIC Magic-Tee

MIC Magic-Tee에 의한 X-Band Balanced Mixer

This poper proposes the method of the balanced-mixer realization in the X-Band frequency range by the MIC coplanar magic-tee. This magic-tee is composed with microstrip and slot, as suggested by Ronde. The characteristics of balancing and isolation in this magic-tee is more preferable to those of the rat-race or hybrid ring in the wide frequency range. So, experimentally in this paper the characteristics of the MIC balanced-mixed are obtained with the VSWR less than 1, 2(in Local and Signal Arms) and the Conversion Loss, 6 dB in that frequency range, when the mixer is designed in the 3rd order (in E-arm) and 2nd order(in H-arm) Chebyshev matching networks, and with two symmetrical Schottkey Barrier Diodes.

本論文은 X-Band마이크로波周波數領域에서 MIC平面magic tee를 利用하여 平衡mixer를 구현하는 方法을 提示한다. 이 magic-tee는 일찍이 Ronde에 의하여 마이크로스트립과 슬로트線路로서 실현할 수 있음이 提示되었으며 또한 이 magic-tee가 rat-race나 hybridring보다 좋은 特性을 가지고 있음이 確認되었다. 本硏究에서는 3rd order(E-arm)와 2nd order(H-arm)의 Chebyshev整合回路를 設計한 MIC magic-tee와 2개의 對稱特性을 갖는 Schottkey barrier 다이오우드로 平衡mixer를 製作한 結果 VSWR<1.2 및 conversion loss=6dB 程度의 廣帶域mixer가 됨을 確認하였다.