Research And Design Of Fuze Antenna

The paper briefly introduces the basic theory of microstrip antenna, mainly designs some rocket-borne fuze antenna according to these theories and develops three kinds of microstrip patch antennas adopted coaxial line feed, the three kinds of microstrip patch antennas are circularly polarized antenna, linear polarized antenna and broadband antenna, which have the same sizes and are designed with single layer structure.While the circularly polarized patch antenna is designed and simulated, some methods to realize circular polarization are introduced, finally simple two-point feeding technique is adopted and a circular plate-shaped patch antenna worked on the 21 TM mode is designed. The structure of the antenna has the advantage of narrow bandwidth, while the bandwidth from simulation only has 40 MHz, and angelhood of the axial ratio is quite troublesome.A circular plate-shaped patch antenna worked on the 21 TM mode is designed. Like the circular polarization circular plate-shaped patch antenna, the bandwidth is still narrow. In order to realize the testing and debugging in later period, four same grooves are opened in the four symmetrical places on the circular ring paster. The depth of the grooves can affect the matching condition of the antennae. The resonance point should be above simulation's, the reason is that the dielectric constant is too high, then according to the test results of the antenna is corrected.The wide-band antenna is a patch antenna mainly used for the fundamental mode, the maximum radial direction of it is on the axial direction perpendicular to the antenna patch. Grooving on the parasitic patch is to match with the antennae, increase surface current path under this circumstance and generate more resonant frequency. The bandwidth of antennae reaches 13% when the antennae is simulated. The antennae has a test analysis and is debugged to finalize after the material object is processed, According to the result, the bandwidth of the antennae is greater than the simulation. The reason may be is that the paster is stimulated and the adjustment of parasitic patch gas is influenced and then antenna is corrected.