Title :
An electronically scanned array with beam switching using a coupled phase-locked loop array
Author :
Yan, Sheng-Hong ; Chu, Tah-Hsiung
Author_Institution :
Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei
Abstract :
This paper presents an ESA with beam-switching capability. Using a type-II CPLLA and a reference signal, this EAS steers its pattern by a DC control voltage, reduces the beam-pointing error arising from phase errors, and holds its operating frequency stably at the reference frequency. By one switch and two buffer amplifiers, it switches its pattern between the sum and difference patterns. Utilizing prescalers, its beam-scanning range is significantly extended. Thus, it has the potential for target tracking applications.
Keywords :
amplifiers; antenna arrays; buffer circuits; phase locked loops; voltage control; DC control voltage; beam switching; beam-pointing error; buffer amplifiers; coupled phase-locked loop array; electronically scanned array; operating frequency; phase errors; reference frequency; Circuits; Frequency; Optical coupling; Oscillators; Phase locked loops; Phased arrays; Switches; Target tracking; Tuning; Virtual colonoscopy;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619306
