发明名称 |
COMPOSITE RIGHT/LEFT HANDED (CRLH) BRANCH-LINE COUPLERS |
摘要 |
High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.
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申请公布号 |
US2009079513(A1) |
申请公布日期 |
2009.03.26 |
申请号 |
US20080122371 |
申请日期 |
2008.05.16 |
申请人 |
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA |
发明人 |
ITOH TATSUO;CALOZ CHRISTOPHE;LIN I-HSIANG;OKABE HIROSHI |
分类号 |
H01P5/18 |
主分类号 |
H01P5/18 |
代理机构 |
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代理人 |
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地址 |
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