Your Search Results

Use this resource - and many more! - in your textbook!

AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Experience the freedom of customizing your course pack with AcademicPub!
Not an educator but still interested in using this content? No problem! Visit our provider's page to contact the publisher and get permission directly.

Planar channelized log-periodic antenna

By: Richards, P.L.; O'Brient, R.; Lee, A.; Myers, M.J.; Tran, H.; Holzapfel, W.; Engargiola, G.; Spieler, H.;

2005 / IEEE / 0-7803-9128-4


This item was taken from the IEEE Conference ' Planar channelized log-periodic antenna ' We present the design, simulation, and measurement of a dual linearly polarized log-periodic antenna matched to a log-periodic channelizing filter through a tapered microstrip balun. The design can be implemented monolithically. A prototype of the channelized antenna, which operates over 1 - 5 GHz, is realized on printed circuit board with a dielectric constant of 4.5. Because we designed the antenna and channelizer with the same log-period (/spl tau/ = 1.2) the variation in antenna impedance and radiation pattern is theoretically the same over every channel (/spl Delta/v/v - 0.2). The channel-averaged radiation patterns show less variation from channel to channel (1.64 - 5.26 GHz) than do radiation patterns sampled over a single log-period in frequency (4.39 - 5.26 GHz). We are developing this channelized log-periodic antenna as a scale model of a polychromatic millimeter-wave pixel for an array receiver of transition-edge sensor bolometers. We are constructing such receivers to measure the polarization of cosmic microwave background radiation.