Accession Number:

AD0642773

Title:

WIDEBAND ARRAY ANTENNA USING I-F TIME DELAY STEERING

Descriptive Note:

Final rept.

Corporate Author:

ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s):

Report Date:

1966-10-01

Pagination or Media Count:

25.0

Abstract:

If time delay steering of a wideband array antenna is introduced at the i-f frequency instead of at the r-f level, all of the element signal phases will be different and the summed pulses will not add in-phase to produce a beam in the desired direction. It is found that when i-f delay steering is used, an additional incremental phase shift must be introduced into the local oscillator of each mixer to produce in-phase summation. The delay provides alignment of the envelopes while the local oscillator phase shift provides in-phase summation. This condition is found to be independent of frequency and thus bandwidth. The effect of i-f delay error on the systems response is discussed.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE