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Quasi-optical integrated antenna and receiver front end

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3 Author(s)
Hwang, V.D. ; Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA ; Uwano, T. ; Itoh, T.

A quasioptical receiver front end applicable to both microwave and millimeter-wave receiver arrays is presented. Two planar microwave integrated circuit (MIC) quasioptical receiver circuit designs that integrate a coupled slot antenna, a Schottky-diode balanced mixer, and a local oscillator on the same substrate are described. The even-mode/odd-mode characteristics of the coupled slotlines are used to achieve intrinsic RF/LO and RF/IF isolation. To demonstrate circuit feasibility, X-band scaled models of the circuit unit using a Gunn-diode oscillator on an Epsilam-10 substrate, and MESFET local oscillator on a R/T Duroid substrate were built and tested. Results of these tests are included

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:36 ,  Issue: 1 )