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L -band satellite navigation receiver LTCC technology research -based components

Author: YaoJiangFeng
Tutor: XuRuiMin；ZouYongQuan
School: University of Electronic Science and Technology
Course: Electronics and Communication Engineering
Keywords: LTCC quasi-elliptic function filter single-resonance matching satellite- navigation L-band
CLC: TN967.1
Type: Master's thesis
Year: 2011
Downloads: 80
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Abstract


With the improvement of Satellite navigation receiver antijamming technique, parts of single channel receiver were largely replaced by multicenter receiver.The requirement of parameters getting higher than ever, such as noise factor, dynamic range, therefore, volumn of the receiver become larger, reliability is reduced and cost is increased.LTCC technique is an effective solution to these problems.The paper introduces the basic theory on microwave band-pass filters(BPF) and the principle of quasi-elliptic function filter. The resonator components of filter are realized by using the method of lumped parameter and distribution parameter.The cross-coupling and the transmission zeroes can be achieved by the multilayers structure in LTCC. Based on the design theory of LTCC BPF, this paper introduced the design process of two types of LTCC filters. The testing result shows that the size of L-band two poles filter realized by lumped parameter is only 3.8mm×2.7mm×0.96 mm, the bandwidth of 3dB is 200MHz, the insertion loss is less than 2dB, the shape factor(30 dB /3dB) is 3.The article has made some research on LNA that based on LTCC technique.The LNA is designed by the method of single-resonance matching.The problem is solved that EM-simulation can not be applied in active-circuits and the circuits-simulation is not fit for the complicated structure by using co-simulation method. The testing result shows the dimension was only 7 mm×5.5mm ,the noise factor is superior to 0.7dB,the gain is above 26 dB,the return loss is less than -15dB.On the basis of receiver theory, the paper especially introduced satellite navigation receiver (include Radio Freqency and frequency conversion module), Eventually, the analysis of the whole layout and test were implemented for the module.the performance is excellent.The volumn has great advantage over the tranditional form that was only 68 mm×58 mm×21mm.The volumn decreased to forty percent.Also, the author analyze the results and give suggestion for improvement.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio navigation > Navigation systems of the various institutional > Satellite navigation system
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