L frequency band LTCC band pass filter
A technology of band-pass filter and frequency band, which is applied in the field of L-band LTCC band-pass filter to achieve the effect of reducing parameter sensitivity, improving yield and reducing the requirements of processing technology.
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[0016] Such as figure 1 As shown, the present invention is a third-order bandpass filter with a pair of transmission zeros, including two LC parallel resonators connected in parallel to the ground, and two series-connected LC parallel resonators separately control a transmission zero, which is used in the design process This feature can improve work efficiency.
[0017] The input terminals of the filter are connected to the input terminals of the capacitors C1 and C2 and the inductors L1 and L2, the output terminals of C1 and L1 are grounded, the output terminals of C2 and L2 are connected to the input terminals of C3 and L3, and the output terminals of C3 and L3 are connected to the other The input terminals of a pair of C1 and L1 are connected with the output terminals of the filter. Due to the parallel loop on the series branch, the transmission admittance of the whole circuit is 0 at parallel resonance, so the two loops form two independently controllable transmission zer...
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