Multiband phased array antenna utilizing a unit cell
AssigneeRockwell Collins, Inc.
InventorsJames B. West, Mohamed Wajih A. Elsallal
Life of this patent
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Abstract
A multi-band phased array antenna for radiating low frequency band signals and high frequency band signals. The multiband phased array antenna is formed from unit cells having waveguides for radiating high frequency band signals and end-fire radiating elements for radiating low frequency band signals. The unit cells have four walls with an open input end and an open radiating end. End-fire radiating elements are disposed on inner surfaces and outer surfaces of the four walls and radiate out the radiating end. Four waveguides are disposed together to radiate into the input end of the low frequency assembly.
Claims20
A multiband phased array antenna for radiating low frequency band signals and high frequency band signals said multiband phased array antenna formed from a plurality of unit cells each of said unit cells comprising:
- a low frequency assembly comprising:
- four walls disposed with perpendicular pairs of parallel walls thereby forming a square configuration with an open input end and an open radiating end;
- and
- end-fire radiating elements disposed on the four walls and radiating out the radiating end;
- and
- a high frequency assembly comprising four high frequency square waveguides said four high frequency square waveguides sized and arranged in a square to radiate into the input end of the low frequency assembly square waveguide.
A multiband phased array antenna for low frequency band signals and high frequency band signals comprising:
- a plurality of unit cells disposed with said unit cells adjacent to each other wherein each unit cell further comprises:
- four walls disposed with perpendicular pairs of parallel walls to form a square configuration having an open input end and an open radiating end;
- end-fire radiating elements disposed on surfaces of the four walls and radiating and receiving low frequency band signals out the radiating end;
- at least four high frequency square waveguide radiating elements disposed together said high frequency square waveguide radiating elements having open ends radiating and receiving high frequency band signals into the input end and out the radiating end of said square configuration;
- and
- a plurality of phase shifters connected to unit cells to shift the phase of the low frequency band signals and the high frequency band signals to steer a beam of the phased array antenna.
A multiband unit cell comprising:
- four walls disposed with perpendicular pairs of parallel walls to form a square configuration having an open input end and an open radiating end;
- notch radiating elements disposed on surfaces of the four walls and radiating and receiving low frequency band signals out the radiating end;
- and
- at least four high frequency square waveguide radiating elements disposed together said high frequency square waveguide radiating elements having open ends radiating and receiving high frequency band signals into the input end and out the radiating end of said square configuration.
Dependencies are inferred from the claim text.