| Conformal microstrip antenna is known as a key technique in radio fuze system.In this thesis,we study the fuze conformal microstrip antennas theroies and method to design two fuze conformal microstrip antennas that are suitable for radio fuze.The two designed antennas must have the respective center frequency f0 =3.5GHz and f0=2.45GHz, other properties being not less than bandwidth 15.0MHz (VSWR ≤ 2),antennas gain 4dBi and half-power beamwidth 65°.By simulation and analysis to the fuze conformal microstrip antenna of XX howitzer,the radiation model about this kind of T- shaped antenna is set up.Based on this model, two fuze antennas were given,which one had a center frequency f0=3.5GHz ,bandwidth 22.9MHz(VSWR ≤ 2) ,antenna gain 4.84dBi and half-power beamwidth 65.3° ;another center frequency 2A5GHz ,bandwidth 10.2MHz(VSWR ≤ 2),antenna gain 3.47dBi and half-power beamwidth 86.9°, according to the simulation and analysis results of the software of Zeland named IE3D which is an electromagnetic simulation software.Using broadband frequency art of microstrip antenna with integrated reactive loading,the antenna characteristic of the center frequency 2A5GHz was improved.Finally,the properties of bandwidth 17.4MHz (VSWR ≤ 2) ,antenna gain 6.13dBi ,and half-power beamwidth 85.9° were presented,by adding two integrated reactive loading with different structure .Basically,the parameters of the two designed antennas reached the design demand. |
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