Directional coupler, antenna interface unit and radio base...

Details Directional coupler, antenna interface unit and radio base... Directional coupler, antenna interface unit and radio base...

2006-07-11

2006-07-11

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S238000

Reexamination Certificate

active

07075387

ABSTRACT:
A directional coupler for radio frequency application, comprising: an input (110) for receiving a radio frequency input signal; a port (120) for delivering a radio frequency output signal; a first elongated conductor (150; 150:1), suspended in air between two ground planes, for connecting the input (110) with the port (120); the first conductor (150) comprising a sandwich structure with a first upper conductive strip (150A), a first intermediate layer comprising a dielectric material and a first lower conductive strip (150B); a second elongated conductor (200; 200:1), suspended in air between two ground planes, the second elongated conductor (200:1) comprising a sandwich structure with a second upper conductive strip (200:1A), a second intermediate layer comprising a dielectric material and a second lower conductive strip (200:1B); said first elongated conductor (150; 150:1) and said second elongated conductor (200; 200:1) being substantially parallel; said first upper and lower conductive strips and said second upper and lower conductive strips, respectively, having conductive interconnections (190, 210, 158).

REFERENCES:
patent: 4521755 (1985-06-01), Carlson et al.
patent: 4612548 (1986-09-01), Beltran
patent: 5012209 (1991-04-01), Lantagne et al.
patent: 6542048 (2003-04-01), Sherman et al.
patent: 2 665 579 (1992-02-01), None
patent: 62-114301 (1987-05-01), None
patent: WO 99/27606 (1999-06-01), None
patent: WO 99/33139 (1999-07-01), None

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