Array Optimization for Maximum Realized Gain in Terahertz Antenna with Lens

The main shortcoming of the photoconducting terahertz sources is their low output power. Traditionally the antenna beam is focused using a dielectric lens to achieve high directivity but, since the radiated power of an antenna is in the order of micro watt, the power which comes out of the lens is v...

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Bibliographic Details
Published in2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting pp. 125 - 126
Main Authors Ghazi, Galia, Sadri-Moshkenani, Parinaz, Safian, Reza
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2019
Subjects
Imaging
Lenses
Phased arrays
Silicon
Substrates
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Summary:The main shortcoming of the photoconducting terahertz sources is their low output power. Traditionally the antenna beam is focused using a dielectric lens to achieve high directivity but, since the radiated power of an antenna is in the order of micro watt, the power which comes out of the lens is very low. One way to increase the output power is to use an array of antennas to feed the lens. Here we investigate the effect of the antenna size and the array pitch on the realized gain of the system which consists of the antenna array and a lens. Simulation results for different antenna sizes and different pitch values of the antenna array are provided. Based on the simulation results, increasing number of array elements, increases total output power but directivity of the systems decreases. At lower frequencies the array with larger elements has higher realized gain but, the array element size does not have any effect at higher frequencies.
ISSN:1947-1491
DOI:10.1109/APUSNCURSINRSM.2019.8889215