Non-reflection filter with equal ripple response
A filter and equi-ripple technology, applied in the filter field, can solve problems such as poor filtering performance, uncontrollable response, and flat passband, etc., and achieve good filtering effect, high-order expansion, and uniform suppression
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[0027] Example 1
[0028] A third-order non-reflective filter with an isobaric response, as schematically Figure 1 Shown, including the first port 101, the second port 102, the third port 103, the fourth port 104, four first inductors 105, two second inductors 106, four first capacitors 107, two second capacitors 108, two third capacitors 109, two third inductors 1010, inverter 1011.
[0029] Two first inductors 105 are connected in series between the first port 101 and the second port 102, the first branch is provided between the two first inductors 105, the first branch comprises a second inductor 106 and a third capacitor 109 connected in series, one end of the second inductor 106 is connected to the first inductor 105, the other end of the second inductor 106 is connected to the third capacitor 109, and the other end of the third capacitor 109 is grounded, constituting a first low-pass branch. The second low-pass branch is the same structure as the first low-pass branch and s...
Example Embodiment
[0035] Example 2
[0036] A fifth-order non-reflective filter with an isobaric response, as schematic Figure 3 As shown, the circuit structure in the present embodiment comprises a first port 101, a second port 102, a third port 103, a fourth port 104, four first inductors 105, four second inductors 106, four third inductors 1010, two fourth inductors 1012, four first capacitors 107, four second capacitors 108, four third capacitors 109, two fourth capacitors 1013, inverters 1011.
[0037] Three inductors are connected in series between the first port 101 and the second port 102, the first two inductors 105 and the fourth inductor 1012 are each provided with a first branch, the first branch comprises a second inductor 106 and a third capacitor 109 connected in series, one end of the second inductor 106 is connected to the first inductor 105, the other end of the second inductor 106 is connected to the third capacitor 109, and the third capacitor 109 is grounded at the other end, c...
Example Embodiment
[0042] Example 3
[0043] A fifth-order capacitive non-reflective filter with an equal ripple response, as shown in the schematic Figure 5 As shown, the present embodiment is based on the circuit of Example 2, a fifth capacitor 1014 is additionally provided on the low-pass branch, a fifth inductor 1015 is additionally provided on the high-pass branch, the fifth capacitor 1014 is connected to the second inductor 106 end of the two first branches in each low-pass branch, and the two ends of the fifth inductor 1015 in each high-pass branch are connected to the second capacitor 108 end of the two second branches.
[0044] The component values of each element of the present embodiment are: the inductance values of the four first inductors 105 are 365.2606pH, the capacitance values of the four first capacitors 107 are 69.3486pF, the inductance values of the two fourth inductors 1012 are 386.9423pH, the capacitance values of the two fourth capacitors 1013 are 65.4627pF, the inductance va...
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