Gaussian Optics Lens Antenna (GOLA) System for Plasma Diagnostics

A Gaussian optics lens antenna system has been designed, fabricated and tested for the plasma diagnostic systems on the Aditya Tokamak. The performance of the designed antenna system is compared with our own designed conventional conical horn antenna in Ka-band spectrum. A gain improvement of 11 dB has been achieved in GOLA system, having gain about 33dB and half power beam width 1.6 degrees compared to conical horn, which has gain about 22-dB and half power beam width 12 degrees respectively. The performance of indigenously designed and fabricated antenna system has also been simulated using CST Microwave Studio and ZEMAX optical designing software. The simulated findings of gain and 3dB bandwidth of both antenna systems are well matched with experimental findings.