Reducing coupling coefficient variation by using capacitors

• Main Authors: REISNER RUSS, GUO JIUNN-SHENG, SCOLES BRADLEY D, LI YANG, ZHANG GUOHAO, ZHU XUANANG, HOANG DINHPHUOC V, PRIKHODKO DMITRI, VIVEIROS DAVID
• Format: Patent
• Language: English
• Published: 06.01.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; WAVEGUIDES

A coupler is presented that has high-directivity and low coupling coefficient variation. The coupler includes a first trace associated with a first port and a second port. The first port is configured substantially as an input port and the second port is configured substantially as an output port. The coupler further includes a second trace associated with a third port and a fourth port. The third port is configured substantially as a coupled port and the fourth port is configured substantially as an isolated port. In addition, the coupler includes a first capacitor configured to introduce a discontinuity to induce a mismatch in the coupler.