发明名称 |
MULTIPLE FREQUENCY ANTENNA STRUCTURES AND METHODS FOR RECEIVING NAVIGATION OR RANGING SIGNALS |
摘要 |
In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Different decorrelation may be used for signals from a satellite than from a land-based transmitter, such as using a digital decorrelator for signals from the satellite and an analog decorrelator for signals from a land-based transmitter. The receivers may include both a GNSS antenna and a local antenna. The phase centers of the two antennas are within one wavelength of the GNSS signals from each other. The local antenna is sized for operation in the X or ISM-bands of frequencies. The GNSS antenna is a patch antenna where the microwave antenna extends away from the patch antenna in at least one dimension.
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申请公布号 |
US2007285308(A1) |
申请公布日期 |
2007.12.13 |
申请号 |
US20040909140 |
申请日期 |
2004.07.30 |
申请人 |
INTEGIRNAUTICS CORPORATION |
发明人 |
BAUREGGER FRANK N.;ZIMMERMAN KURT R.;COBB H. S.;IZADIAN JAMAL |
分类号 |
G01S19/44;G01S5/14;G01S19/46 |
主分类号 |
G01S19/44 |
代理机构 |
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主权项 |
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地址 |
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