The bandwidth performance of a twoelement adaptive array with tapped delayline processing
Abstract
The bandwidth performance of a twoelement adaptive array with a tapped delay line behind each element is examined. It is shown how the number of taps and the delay between taps affect the bandwidth performance of the array. An array with two weights and one delay behind each element is found to yield optimal performance (equal to that obtained with continuouswave interference) for any value of intertap delay between zero and T90/B, where T90 is a quarterwavelength delay time and B is the fractional signal bandwidth. Delays less than T90 yield optimal performance but result in large array weights. Delays larger than T90/B yield suboptimal signaltointerferenceplusnoise ratio when each element has only two weights. For delays between T90/B and 4T90/B, the performance is suboptimal with only two taps but approaches the optimal if more taps are added to each element. Delays larger than T90/B result in suboptimal performance regardless of the number of taps used.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 January 1988
 DOI:
 10.1109/8.1069
 Bibcode:
 1988ITAP...36....5C
 Keywords:

 Adaptive Control;
 Antenna Arrays;
 Bandwidth;
 Delay Lines;
 Autocorrelation;
 Matrices (Mathematics);
 Signal To Noise Ratios;
 Transfer Functions;
 Electronics and Electrical Engineering