Title :
Active-notch antennas stabilized with a slotline-ring resonator for wireless applications
Author :
Montiel, Claudio M. ; Fan, Lu ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
This article discusses the design and measurements of two compact and low-cost Gunn-diode active-notch antennas and compares the results with a similarly configured passive antenna. The antennas feature a slotline-ring resonator for frequency stabilization and external Q improvement. The active antennas´ radiation patterns compare well with those measured for a similar passive antenna. The active antenna can incorporate a varactor for frequency tuning with a frequency range of about 400 MHz or 4.2%. This circuit should have many applications in wireless communication, sensor, RF identification, or Doppler radar applications
Keywords :
Doppler radar; Gunn diodes; Gunn oscillators; Q-factor; active antennas; antenna radiation patterns; antenna testing; electric sensing devices; frequency stability; microwave antennas; radar antennas; radio equipment; slot line components; 9.178 to 9.316 GHz; Doppler radar applications; Gunn-diode active-notch antennas; RF identification; SHF; external Q improvement; frequency range; frequency stabilization; frequency tuning; low-cost antennas; passive antenna; radiation patterns; sensor; slotline-ring resonator; varactor; wireless applications; Antenna measurements; Antenna radiation patterns; Circuit optimization; Radio frequency; Radiofrequency identification; Resonant frequency; Slot antennas; Tuning; Varactors; Wireless communication;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
