Title :
28 GHz omni-directional quasi-optical transmitter array
Author :
Vaughan, Mark J. ; Compton, Richard C.
Author_Institution :
Sch. of Electr. Eng., Cornell Univ., Ithaca, NY, USA
fDate :
10/1/1995 12:00:00 AM
Abstract :
Omni-directional base stations are needed in many emerging wireless communication systems. This paper presents the first adaptation of a quasi-optical oscillator array for this purpose. A 28 GHz active oscillator element containing a modified Vivaldi endfire antenna is utilized as the unit cell. Twelve of these are incorporated into the circular array, which is powered from a single DC power supply. The array has a high combining efficiency and remains frequency-locked over a span of 600 MHz
Keywords :
active antenna arrays; linear antenna arrays; millimetre wave antenna arrays; millimetre wave devices; millimetre wave oscillators; power combiners; radio transmitters; 28 GHz; EHF; MM-wave circular array; active oscillator element; frequency-locked array; high combining efficiency; modified Vivaldi endfire antenna; omni-directional base stations; omni-directional transmitter array; quasi-optical oscillator array; quasi-optical transmitter array; wireless communication systems; Antenna arrays; Base stations; Dielectric resonator antennas; Dielectric substrates; Dipole antennas; Microstrip antennas; Oscillators; Power generation; Slot antennas; Transmitters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
