【Microwave filter design function】 ● 〜It enables the instantaneous design of various active filters simply by inputting the specifications〜   ● It can design ＬＰＦ, ＨＰＦ, ＢＰＦ, and ＢＥＦ filters using LC, micro strip, electrical length line, and strip line. ● It can specify characteristics of Chebyshev, Butterwoth, Bessel, simultaneous Chebyshev (ellipse). ● It can conduct design with various circuit compositions such as stub type, coupled line type, stepped impedance type, and the like. ● It calculates the necessary degree from the indicated specification and has a design range of up to 20 degrees (up to 11 degrees for Bessel characteristic).

〜Operation procedur〜 1. Select an design item such as LPF design. 2. Select a characteristic page such as Chebyshev, Butterwoth and the like. 3. Enter the specifications, such as cut-off frequency and attenuation. 4. Specify the circuit type, such as lumped constant (LC) composition, micro strip composition, and the like. 5. Press the design button. 6. The circuit diagram is completed. 7. The Simulation command will transfer the data to a simulator such as S･NAP-Pro and immediately conduct simulation. 8. Design is conducted with consideration of discontinuous components that are generated at the step section, open section, and Tee junction.

【Example of stepped impedance type Chebyshev LPF （micro strip）】 ● ● This is an example of Chebyshev LPF designed by the stepped impedance type using micro strip. ● It is specified that the cut-off shall be at 2.5 GHz and it attenuates 30 dB at 3.5 GHz ● Enter the constant for the printed board. Ｈ＝１ｍｍ and Er＝３．４ are used in the example. ● As a result, it is designed at 7 degrees. ● Design is conducted with consideration of the discontinuous component that is generated at the step section. 【Example of edge couple type Chebyshev BPF design （micro strip）】 ● ● This is an example of Chebyshev BPF designed by the edge-coupled line using micro strip. ● It is specified that the center frequency shall be 2.45 GHz and bandwidth shall be 100 MHz. ● ﾊEnter the constant for the printed board. Ｈ＝１ｍｍ and Er＝３．４ are used in the example. ● As a result, it is designed at 3 degrees. ● Design is conducted with consideration of the fringing capacitor component that is generated at the open terminal section of the coupled line. 【Example of Chebyshev BPF design （LC）】 ● ● This is an example of Chebyshev BPF designed using LC tank constitution (top C). ● It is specified that the center frequency shall be 500 MHz and bandwidth shall be 0 MHz. ● As a result, it is designed at 3 degrees. ● LC can be substituted with the self-resonance model. 【Other filter design examples】 ● 〜There are various filter design examples such as simultaneous Chebyshev, Bessel, and the like. Click the titles below〜 ● ＬＰＦ(500MHz)Bessel type ＬＣ ● ＬＰＦ(2.5GHz)Elliptic type micro strip ● ＨＰＦ(1.2GHz)Elliptic type electric length line ● ＢＰＦ(500MHz)Elliptic type ＬＣ 2 degrees ● ＢＰＦ(5.6GHz)Elliptic type electric length line ● ＢＰＦ(500MHz)Constant delay type ＬＣ ● ＢＳＦ(1.2GHz)Chebyshev type micro strip Top of the Page Copyright(C) 2000 MEL Inc.