发明名称 APERTURE-COUPLED MICROWAVE APPARATUS
摘要 <p>APERTURE-COUPLED MICROWAVE APPARATUS In a microwave device, for example a microwave local oscillator with a harmonic mixer for feedback control, problems of coupling the mixer circuit to the R.F. cavity are overcome by providing a d.c. blocking capacitor of the mixer on a planar surface of a support extending across an aperture in one wall of the cavity. In preferred embodiments the capacitor is a planar device formed by a plurality of interdigitated fingers. These fingers are oriented to couple magnetically with the R.F. energy at the aperture in the cavity. The support conveniently comprises a printed circuit board having a ground plane on the same surface as the capacitor, which is located in a small opening in the ground plane. A second ground plane is provided on the opposite side of the printed circuit board, overlying the opening. The two ground planes are interconnected by plate-through-holes.</p>
申请公布号 CA1195393(A) 申请公布日期 1985.10.15
申请号 CA19830428268 申请日期 1983.05.16
申请人 NORTHERN TELECOM LIMITED 发明人
分类号 H03D9/06;H01P5/00;H05K1/02;H03B19/18;H05K1/16;H05K3/00 主分类号 H03D9/06
代理机构 代理人
主权项
地址