Design of Three-Resonator Dissipative Band-Pass Filters Having Minimum Insertion Loss
- 1 May 1957
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 45 (5) , 681-687
- https://doi.org/10.1109/JRPROC.1957.278417
Abstract
The purpose of this paper is to present universal design curves for three-resonator band-pass filters having minimum insertion loss. This information is obtained by solving Dishal's equations for a band-pass network uniquely for the condition of minimum insertion loss, the network here consisting of three synchronously tuned resonant circuits (coupled to a resistive generator and a resistive load) having the same finite value of unloaded Q. The general solution for the maximally flat response is presented in detail in the second half of this paper. The exact values of the circuit constants for a minimum-insertion-loss response are given both analytically and graphically in terms of the unloaded Q and the fractional bandwidth. Also, the deviation from the exact response shape of a maximally flat filter is discussed for varying values of circuit constants.Keywords
This publication has 3 references indexed in Scilit:
- Concerning the minimum number of resonators and the minimum unloaded Q needed in a filterTransactions of the IRE Professional Group on Vehicular Communications, 1953
- Alignment and Adjustment of Synchronously Tuned Multiple-Resonant-Circuit FiltersProceedings of the IRE, 1951
- Design of Dissipative Band-Pass Filters Producing Desired Exact Amplitude-Frequency CharacteristicsProceedings of the IRE, 1949