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A multiple band, polarization diversified antenna system that accommodates a plurality of independent and separate antenna subsystems that share a common aperture and boresight. The antenna system includes a first low-band antenna subsystem for one polarization mode in a low frequency band, a second

A multiple band, polarization diversified antenna system that accommodates a plurality of independent and separate antenna subsystems that share a common aperture and boresight. The antenna system includes a first low-band antenna subsystem for one polarization mode in a low frequency band, a second low-band antenna subsystem for another polarization mode in the low frequency band and a high-band, dual-polarization, dual-reflector antenna subsystem for two high-frequency antenna subsystems having orthogonal polarization modes. The dual-reflector antenna subsystem includes a main reflector, a sub-reflector and a support cone. The two low-band antenna subsystems and the high-band, dual-polarization feed subsystems are all positioned behind the main reflector of the high-band dual-reflector antenna subsystem. The signals transmitted by the high-band antenna are directed towards the sub-reflector and are reflected therefrom to be directed towards the main reflector. The signals are reflected from the main reflector to be emitted toward free space from the antenna system through the support cone. The low-frequency signals pass through the main reflector, the sub-reflector and the support cone. The main reflector, the sub-reflector and the support cone are suitable frequency selective surfaces so that the main reflector and the sub-reflector are reflective to the high-frequency signals and are transparent to the low-frequency signals, and the support cone is transparent to both the high-frequency and low-frequency signals.

대표청구항 ▼

[ What is claimed is:] [1.]1. A multiple-band, polarization-diversified antenna system for transmitting and receiving a plurality of RF signals through a common physical aperture and a common boresight, said system comprising:a first antenna including a first feed network for transmitting and receiv

[ What is claimed is:] [1.]1. A multiple-band, polarization-diversified antenna system for transmitting and receiving a plurality of RF signals through a common physical aperture and a common boresight, said system comprising:a first antenna including a first feed network for transmitting and receiving RF signals in one frequency band and polarization mode;a second antenna including a second feed network for transmitting and receiving RF signals in at least one frequency band and polarization mode; anda dual reflector antenna for transmitting and receiving RF signals in at least one frequency band, where the frequency band used by the reflector antenna is different than the frequency band used by the first or second antenna, said reflector antenna being positioned in front of the first and second antennas, said dual reflector antenna including a first surface, a second surface, a support surface and a reflector feed subsystem, said first and second surfaces being reflective to the RF bands transmitted and received by the reflector feed subsystem and being substantially transparent to the RF bands transmitted and received by the first and second antennas, and said support surface being substantially transparent to the RF bands transmitted and received by the first and second antennas and the dual reflector antenna.