Title :
A new artificial dielectric leaky-wave scanning antenna for 60-90 GHz frequency range
Author :
Vishwakarma, B.R. ; Sharma, R.P.
Author_Institution :
Inst. of Technol., Banaras Hindu Univ., Varanasi, India
Abstract :
An artificial dielectric leaky wave antenna is proposed for the millimeter range, and its radiation characteristics and scanning capability are estimated for the frequency band from 60 to 90 GHz. Both frequency scanning and dielectric scanning are studied theoretically for a finite-length antenna. The variation of refractive index and permittivity as a function of frequency is calculated. Both are found to increase with increasing frequency but there is no appreciable change in permeability with frequency. To analyze the propagation characteristics, real and imaginary parts of the propagation constant for the proposed leaky-wave antenna are evaluated as a function of frequency. Calculations show that the gain of the proposed antenna depends on the frequency of operation, changing from 25 dB to 28.5 dB where the frequency is varied from 60 to 90 GHz.<>
Keywords :
dielectric-loaded antennas; microwave antennas; 25 to 28.5 dB; 60 to 90 GHz; artificial dielectric leaky-wave scanning antenna; dielectric scanning; frequency scanning; microwave; millimeter range; permittivity; refractive index; Antenna theory; Antennas and propagation; Dielectrics; Frequency estimation; Image analysis; Leaky wave antennas; Permeability; Permittivity; Propagation constant; Refractive index;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1988. AP-S. Digest
Conference_Location :
Syracuse, NY, USA
DOI :
10.1109/APS.1988.94210
