By Topic

A different perspective on taper efficiency for array antennas

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
E. L. Holzman ; Telaxis Commun. Corp., South Deerfield, MA, USA

Taper efficiency is a relative figure of merit for antenna arrays giving the loss of directivity due to array amplitude and phase weighting. The derivation of the standard formula for antenna array taper efficiency proceeds from the definition of antenna directivity given the assumption that the array elements are spaced a multiple of half wavelengths apart. We derive a more physically intuitive definition of the taper efficiency of an array by starting from the communication link range equation. We do not require any assumption regarding element spacing. We find that the taper efficiency is equal to the ratio of beamformer signal gain to noise gain divided by the ratio of the same gains when the beamformer is uniformly weighted, where gain includes the contributions from all active and passive components within the beamformer. This definition is edifying, since an array's amplitude weighting and directivity are manifested primarily within the beamformer. We show that our formula reduces to the standard formula for three examples.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:51 ,  Issue: 10 )