High Efficiency and Extremely High Gain Dome Shaped Microstrip Patch Antenna

A multi band microstrip patch antenna has been proposed in this paper. This antenna operates efficiently for three resonant frequencies - 25.57 GHz, 28.03 GHz, 30.25 GHz and this proves the successful operation of the antenna in two bands i.e. the K-band and Ka-band. To achieve this multi band nature, some slots in the front and the rear part of the antenna are utilised. The front patch of the antenna is made of copper and is devised in a peculiar dome shape which provides a novelty to this antenna. The antenna shows some great results when simulated giving an overall efficiency of more than 90%, A high gain is also recorded for the frequencies and an extremely high gain for 30.25 GHz. Furthermore, the return loss dips(S11) for the three resonant frequencies are stated to be below -30 dB and reaching to as low as -55 dB at the second resonant frequency.