Leaky wave antenna with radiating structure including...

Details Leaky wave antenna with radiating structure including... Leaky wave antenna with radiating structure including...

2007-07-31

2007-07-31

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Slot type

C343S7000MS, C343S895000

Reexamination Certificate

active

11184676

ABSTRACT:
An antenna is provided for acquiring RF signals from various satellite ranging systems including GPS, GLONASS, GALILEO and OmniSTAR®. The antenna configuration includes a radiating structure of multi-arm spiral slots terminated with fractal loops. A leaky wave microstrip spiral feed network is used to excite the radiating structure of the antenna. The fixed beam phased array of aperture coupled slots is optimized to receive a right hand polarized signal. The proposed antenna is made out of a single PCB board. The antenna has a very uniform phase and amplitude pattern in the azimuth plane from 1.15 to 1.65 GHz, therefore providing consistent performance at GPS, GLONASS, GALILEO and OmniSTAR® frequencies. The antenna also has a common phase center at the various frequencies from 1175 MHz to 1610 MHz and substantially the same radiation pattern and axial ratio characteristics.

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Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration. PCT/CA2006/001127. Nov. 2, 2006.

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