Study On Millimeter Wave Frequency Selective Surface And Its Application To Antenna Superstrate

With the continuous development of millimeter wave technology, millimeter wave devices and antennas in military and civilian communications systems have increasingly widespread application. Especially in the front millimeter-wave communication systems, antenna size, functional and performance requirements become increasingly demanding. Frequency selective surfaces(FSS) is a single-layer or multi-layer or three-dimensional structure for the resonance unit consisting of a two-dimensional periodic arrangement of the electromagnetic wave has a frequency selective action, are widely used in radome or high gain of the antenna superstrateFP(Fabry-Perot) resonant antenna is made up of the antenna feed, reflector plate and partially reflective surface loaded at a certain height or distance from metal reflector plate, having low profile, high-gain, low-cost, simple processing characteristics. The partially reflective surface of FP resonant antenna commonly used metal patch array frequency selective surface. Flat two-dimensional material graphene as a minimum thickness of carbon atoms, with a high transmittance, high mechanical strength, high electron mobility and thermal conductivity, electrical conductivity and other fine features controllable with traditional metal FSS can form composite frequency selective surface.This paper studies the high-gain and low-profile millimeter wave antenna using partially reflective surface single-ended slotted waveguide slot antenna as the antenna feed, metal patch array of frequency selective surfaces(FSS) and the graphene composite frequency selective surfaces, respectively, as designed several new millimeter wave FP resonant antenna, the main work and innovations are as follows:1. Based on the basic theory of metal patch array frequency selective surface, designed the millimeter-wave frequency selective surface(FSS) as center frequency is 25 GHz, studied its transmission and reflection characteristics, and experimental verification;2. Based on a single-ended slotted waveguide slot antenna and FP resonant antenna design theory, with metal reflectors and AMC reflection plate designed of the millimeter-wave metal patch antenna array FSS superstrate as center frequency is 25 GHz, respectively. the maximum gain is 16 d Bi and 15.1d Bi at the operating frequency, thicknesses of 6mm and 3.7mm, respectively. making two kinds of millimeter wave FSS superstrate FP resonant antenna and have tested, to verify the simulation results.3. To study the transmission and reflection characteristics of graphene composite superstrate FSS, FSS graphene-based load metal superstrate designed metal reflectors and AMC two kinds of millimeter wave reflection plate FP resonant antenna, the center frequency of the two antennas are all at 25 GHz, by changing the graphene surface resistivity to change the maximum value of antenna gain and beam width. The simulation results show that when graphene surface resistivity decreased from 50 ?/ sq to 5000?/ sq, the maximum gain of loading metal superstrate FSS designed metal reflector antenna from 15 d Bi reduced to 10 d Bi, 3d B beam width of E-Plane up from 18.0deg to 23.6deg. 3d B beam width of H-Plane up from 21.2deg to 28.8deg; the maximum gain of loading AMC from 13.4d Bi reduced to 5d Bi, 3d B beam width of E-Plane up from 23.6deg to 27.8deg. 3d B beam width of H-Plane up from16.2deg to 20.4deg, Using graphene samples with size of 25 mm ? 25 mm andsurface resistivity from 50?/ sq to 5000?/ sq,the results of the simulation analysis are verified by experimental results.