Neutralization network for multielement antenna
First Claim
1. An improved neutralization network for a multielement antenna of the type including means for compensating for effects of interelement coupling in a closely spaced multielement antenna in order to optimize performance, the improvement comprising:
- the means for compensating disposed between output ports of said closely spaced multielement antenna and input ports of a receiver system, and including a plurality f network input ports corresponding in number to a number of elements of said closely spaced multielement antenna and a plurality of network output ports corresponding in number to a number of input ports of the receiver system;
each of said elements and said plurality of network output ports being respectively connected to each of said plurality of network input ports of said receiver system by individual transmission lines; and
network means for coupling a portion of a signal induced in each element of said closely spaced multielement antenna to all other elements of said closely spaced multielement antenna in proper amplitude and phase so as to neutralize said portion of said signal induced in each element by reflections of an incident wave from all other elements of said closely spaced multielement antenna.
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Accused Products
Abstract
A distributed network that compensates for the effects of interelement coupling in a multielement antenna array is inserted between the output of an antenna array and the inputs of a receiver system. Within the distributed network are a plurality of couplers interconnected by transmission lines serving as phase shifters. The coupling factors of the various couplers and the lengths of the transmission lines are selected so as to apply voltage components of specific amplitudes and phase to the antenna ports. The values of the amplitudes and phases of these voltage components are such as to neutralize the components of the voltages at the output of the antenna array which are caused by the spatial couplings between the elements of the antenna array.
10 Citations
6 Claims
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1. An improved neutralization network for a multielement antenna of the type including means for compensating for effects of interelement coupling in a closely spaced multielement antenna in order to optimize performance, the improvement comprising:
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the means for compensating disposed between output ports of said closely spaced multielement antenna and input ports of a receiver system, and including a plurality f network input ports corresponding in number to a number of elements of said closely spaced multielement antenna and a plurality of network output ports corresponding in number to a number of input ports of the receiver system; each of said elements and said plurality of network output ports being respectively connected to each of said plurality of network input ports of said receiver system by individual transmission lines; and network means for coupling a portion of a signal induced in each element of said closely spaced multielement antenna to all other elements of said closely spaced multielement antenna in proper amplitude and phase so as to neutralize said portion of said signal induced in each element by reflections of an incident wave from all other elements of said closely spaced multielement antenna. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification