Based On LTCC Technology Of Bandpass Filter Design And Production

With the rapid development of modern wireless communications technology, the role of microwave components play an increasingly important role, microwave components must have a small and high-performance features in order to play its greatest role. The size and performance of microwave filters are very important for microwave communication systems.At present, many of the advanced technology, LTCC (low temperature co-fired ceramic) because of its three-dimensional multi-layer three-dimensional technical features for the device miniaturization and high integration of the circuit design provides a very good solution. And LTCC with low loss, high dielectric constant, good characteristics of high frequency,making it very suitable for microwave device design. LTCC technology for processing design microwave filters, can bring a lot of traditional technology can not provide the advantages. In this paper, the LTCC-based bandpass filter is designed and analyzed. The main contents are as follows:Firstly, The application background and related characteristics of LTCC technology are studied. Some important indexes to measure the performance of microwave filter are introduced, such as insertion loss, in - band fluctuation,out - of - band suppression, isolation and standing wave ratio. To the back of the chapter filter simulation of the production of bedding a good theoretical basis.Secondly, a LTCC band-pass filter that can be put into practical application of WLAN is fabricated by simulation. The center frequency of the filter passband is 2.4GHz, the volume is 2.53mm*2.85mm* 1.33mm. The specific application of capacitor and inductor in LTCC is analyzed and analyzed. The three-dimensional structure of microwave filter is established by using electromagnetic simulation software, and the specific physical size is given. At last, the miniaturized and high-performance band-pass filter realized by LTCC is simulated and optimized, and a commercial 2.4GHz LTCC filter is compared.Thirdly, a dual-pass bandpass filter, which can be used in the 2.45GHz /5.45GHz frequency band of WLAN multi-frequency communication system,is designed and simulated. The volume of 4mm*3.2mm*0.6mm, through the electromagnetic simulation software to build the model, comparative analysis of the simulation results.