摘要:
An object of the present invention is to provide a low pass filter that allows the interval between attenuation poles to be easily adjusted. A low pass filter according to the present invention includes: a first via-hole conductor connected to a first end portion of a first inductor and a third end portion of a second inductor and extending to another side in a lamination direction with respect to a second end portion of the first inductor and a fourth end portion of the second inductor; and a first capacitor connected in parallel with at least a portion of the first inductor and a portion of the second inductor and formed by a first capacitor conductor layer.
摘要:
A common mode filter (101) includes, between ports (P1, P2) and ports (P3, P4), a differential transmission line including a first signal line (SL1) and a second signal line (SL2). The first signal line (SL1) includes a first inductor (L1) arranged in series, and the second signal line (SL2) includes a second inductor (L2) arranged in series. In addition, a first resonant circuit (RC1) is provided between the first end of the first inductor (L1) and the ground, and a second resonant circuit (RC2) is provided between the first end of the second inductor (L2) and the ground.
摘要:
The invention relates to a filtering network in HR-Si silicon technology, defined by at least one cut-off frequency FC and comprising an input terminal P1 for receiving the signal to be filtered and an output terminal P2 for delivering a filtered signal. The network comprises a first ground line M1 connected by its ends to first and second ground points Gr1, Gr2 connected directly to the ground plane, a second ground line M2 connected via its ends to third and fourth ground points Gr3, Gr4 directly connected to the ground plane, a plurality of L/C resonant elements Lr1/Cr1, Lr2/Cr2, Lr3/Cr3 connected in parallel and linked via one end to one of the two ground lines L1, L2 and via the other end between them, by means of coupling inductors Ls1, Ls2, Ls3 which thus create transmission zeros. Since each ground line (M1, M2) forms inductive elements (Lm1, Lm2, Lm3) by inductors, the network comprises capacitive elements (Cm1, Cr'1) in series with at least some of said inductive elements (Lm1, Lm2, Lm3), the capacitance of the capacitive elements being chosen so that the resonant frequency of the inductive and capacitive elements in series corresponds to a frequency lying outside the pass band.
摘要:
A left-handed resonator according to the present invention includes: a series body in which an inductor component and a capacitor component are connected in series; and a parallel body in which an inductor component and a capacitor component are connected in parallel, wherein one end of the series body and one end of the parallel body are connected, the other end of the parallel body is grounded, and the other end of the series body is grounded. With this configuration, a -1-order mode is excited using only one unit cell including the series body and the parallel body, so that dimensions of the left-handed resonator can be miniaturized.