Designing And Simulating Of Microwave Ceramic Monoblock Duplexer

The rapid development and application of mobile communication had been lead people of this world to focus attention. Electronic devices play a important roles. Among them, the microwave dielectric component occupies more and more important position. Microwave dielectric ceramic material has the characteristic of low loss, low frequency-temperature coefficient and high dielectric constant. With the improvement of material capability, The devices made of the microwave dielectric ceramic material has the virtues of reliable capability, low insertion loss, little volume, high stability ,which made the microwave dielectric devices playing an important role in the communication industry.The development situation of the microwave dielectric ceramic material and the device made of it were presented briefly. The basic principle about resonators,microwave filter,simulation software were dissertated. Using the research of abroad for reference put forward a kind of ceramic monoblock duplexer to adopting a new out-step resonance structure. This device has excellent performance. Such as small volume,light weight,prone to SMD. This thesis has discussing the principle and structure of designing in detail. The last, we had been designed the monoblock dielectric band-pass duplexers which have the performance of center frequency 1800±△f (MHz) and 900±△f (MHz), insertion loss<1.5 dB, bandwidth 27MHz and 16 MHz, in-band ripple <1.5 dB, VSWR<2.0, attenuation>25dB. The devices were simulated and analyzed by the EDA software.