| The resonance frequency of THz antenna designed by most researchers is generally between 0.1 and 1 THz.However,this does not fully meet the design requirements for the resonant frequency of the THz antennas.In this paper,the antenna of frequency band between 1-10 THz is designed,and in order to eliminate surface wave loss,a new synthetic electromagnetic material-photonic band gap(PBG)structure is introduced.CST software is used to simulate and analyze the microstrip antenna based on photonic band gap structures.The main works of this paper are as follows:1.The basic concept and characteristics of PBG structure are introduced,which provides a theoretical basis for better design of PBG.The advantages and disadvantages of the analysis methods on PBG structures are contrasted.The applications of PBG structures in the field of microwave and optics are described in detail.2.According to the design method of microstrip antenna and improve the size of the antenna in the THz frequency band,a dual-band THz circular patch antenna is designed,and its radiation characteristics and impedance matching are obtained by simulation.A new dual-band photonic band gap structure is designed and loaded into the antenna.The simulation results show that the antenna with PBG structure exhibit better performance in S11 parameters,gain,and radiation efficiency.Meanwhile,the paper also simulated and analyzed the impacts of different filling dielectric materials,the variations of dimensions,position,period,and corrugation depths of the dual-band PBG structures on the resonant characteristics.3.Using the calculation method of 1/4 wavelength microstrip line,THz array patch antenna is designed.The E and cross-shaped PBG structures are designed and loaded into the antenna.The antennas loaded with the PBG structure exhibit better performance compared with that of the uniform substrate antenna.Among the antennas loaded with the PBG structure,cross-shaped PBG illustrates better performance. |
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