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US 6,549,168 B1Granted
GPS and telemetry microstrip antenna for use on projectiles
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsMarvin L. Ryken, Albert F. Davis
Life of this patent
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Abstract
A microstrip antenna system having a GPS antenna for receiving GPS data and a telemetry antenna for transmitting telemetry data mounted on a dielectric substrate. The microstrip antenna system is designed for use on small diameter airborne projectiles which have a diameter of about 2.75 inches. A pair of band stop filters are integrated into the antenna system to isolate the transmitted telemetry signal from the received GPS signal.
Claims20
A microstrip antenna system for use on a small diameter projectile comprising:
- a dielectric substrate wrapped around an outer circumference of said small diameter projectile;
- a microstrip telemetry antenna mounted on said dielectric substrate, said microstrip telemetry antenna transmitting a first RF signal;
- a microstrip GPS (Global Positioning System) antenna mounted on said dielectric substrate in proximity to said microstrip telemetry antenna, said microstrip GPS antenna receiving a second RF signal;
- a first band stop filter integrally formed with said microstrip GPS antenna on said dielectric substrate;
- a second band stop filter integrally formed with said microstrip telemetry antenna on said dielectric substrate;
- and
- said first band stop filter and said second band stop filter providing for a minimum stop-band rejection of approximately 50 decibels to isolate the first RF signal transmitted by said microstrip telemetry antenna from the second RF signal received by said microstrip GPS antenna.
4 more elements
A microstrip antenna system for use on a small diameter projectile comprising:
- a dielectric substrate wrapped around an outer circumference of said small diameter projectile;
- a microstrip telemetry antenna mounted on a ground plane by said dielectric substrate, said microstrip telemetry antenna transmitting an S-Band Radio Frequency signal having a linear polarization;
- a microstrip GPS (Global Positioning System) antenna mounted on said dielectric substrate in proximity to said microstrip telemetry antenna, said microstrip GPS antenna spaced apart from and electrically separated from said ground plane by said dielectric substrate, said microstrip GPS antenna receiving an L-Band Radio Frequency signal having a circular polarization;
- and
- a first band stop filter integrally formed with said microstrip GPS antenna on said dielectric substrate;
- a second band stop filter integrally formed with said microstrip telemetry antenna on said dielectric substrate;
- said first band stop filter and second band stop filter providing for a minimum stop-band rejection of approximately 50 decibels to isolate the S-Band Radio Frequency signal transmitted by said microstrip telemetry antenna from the L-Band Radio Frequency signal received by said microstrip GPS antenna.
4 more elements
A microstrip antenna system for use on a small diameter projectile comprising:
- a dielectric substrate wrapped around an outer circumference of said small diameter projectile;
- a microstrip telemetry antenna mounted on a ground plane by said dielectric substrate, said microstrip telemetry antenna transmitting an S-Band Radio Frequency signal having a linear polarization;
- a microstrip GPS (Global Positioning System) antenna mounted on said dielectric substrate in proximity to said microstrip telemetry antenna, said microstrip GPS antenna spaced apart from and electrically separated from said ground plane by said dielectric substrate, said microstrip GPS antenna receiving an L-Band Radio Frequency signal having a circular polarization;
- and
- a first band stop filter integrally formed with said microstrip GPS antenna on said dielectric substrate;
- a second band stop filter integrally formed with said microstrip telemetry antenna on said dielectric substrate;
- said first band stop filter and second band stop filter providing for a minimum stop-band rejection of approximately 50 decibels to isolate the S-Band Radio Frequency signal transmitted by said microstrip telemetry antenna from the L-Band Radio Frequency signal received by said microstrip GPS antenna;
- a limiter electrically connected to said GPS antenna;
- an amplifier electrically connected to said limiter, said amplifier amplifying an electrical signal provided by said GPS antenna;
- and
- said limiter operating as a protective device to prevent damage to said amplifier.
8 more elements
Dependencies are inferred from the claim text.