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A novel compact balanced-to-unbalanced low-temperature co-fired ceramic bandpass filter with three coupled lines configuration (2008)
| Content Provider | CiteSeerX |
|---|---|
| Author | Chen, Kun-Tzu Chung, Shyh-Jong |
| Abstract | Abstract—This paper proposes a novel compact balanced-to-un-balanced bandpass filter. Firstly, a pre-design circuit is presented, which is composed of an inductive coupled-line bandpass filter and an out-of-phase capacitive coupled-line bandpass filter. A novel compact circuit with three coupled lines configuration, derived from the pre-design circuit, is then proposed for miniaturizing the balanced-to-unbalanced bandpass filter. A 2.4-GHz multilayer ceramic chip type balanced-to-unbalanced bandpass filter with a size of 2.0 mm 1.2 mm 0.7 mm is developed to validate the feasibility of the proposed structure. The filter is designed by using circuit simulation, as well as full-wave electromagnetic simulation softwares, and fabricated by the use of low-temperature co-fired ceramic technology. The measured results agree quite well with the simulated. According to the measurement results, the maximum insertion loss is 1.65 dB, the maximum in-band phase imbalance is within 3, and the maximum in-band magnitude imbalance is less than 0.32 dB. Index Terms—Balanced-to-unbalanced bandpass filter, balun, bandpass filter, low-temperature co-fired ceramic (LTCC). I. |
| File Format | |
| Journal | IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics |
| Publisher Date | 2008-01-01 |
| Access Restriction | Open |
| Content Type | Text |
