A MATLAB-Based Filter-Design Program: From Lumped Elements to Microstrip Lines

2011 ◽  
Vol 53 (1) ◽  
pp. 213-224 ◽  
Author(s):  
M. Alper Uslu ◽  
Levent Sevy
Keyword(s):  
Filter Design ◽  
Microstrip Lines ◽  
Design Program ◽  
Lumped Elements

scholarly journals Reconfigurable Ring Filter with Controllable Frequency Response

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Norfishah Ab Wahab ◽  
Mohd Khairul Mohd Salleh ◽  
Zuhani Ismail Khan ◽  
Nur Emileen Abd Rashid
Keyword(s):  
Insertion Loss ◽  
High Selectivity ◽  
Filter Design ◽  
Center Frequency ◽  
Frequency Range ◽  
Microstrip Technology ◽  
Varactor Diodes ◽  
Single Side ◽  
Lumped Elements ◽  
Capacitive Tuning

Reconfigurable ring filter based on single-side-access ring topology is presented. Using capacitive tuning elements, the electrical length of the ring can be manipulated to shift the nominal center frequency to a desired position. A synthesis is developed to determine the values of the capacitive elements. To show the advantage of the synthesis, it is applied to the reconfigurable filter design using RF lumped capacitors. The concept is further explored by introducing varactor-diodes to continuously tune the center frequency of the ring filter. For demonstration, two prototypes of reconfigurable ring filters are realized using microstrip technology, simulated, and measured to validate the proposed concept. The reconfigured filter using lumped elements is successfully reconfigured from 2 GHz to 984.4 MHz and miniaturized by 71% compared to the filter directly designed at the same reconfigured frequency, while, for the filter using varactor-diodes, the frequency is chosen from 1.10 GHz to 1.38 GHz spreading over 280 MHz frequency range. Both designs are found to be compact with acceptable insertion loss and high selectivity.

Use of FFT subroutine in digital filter design program

1969 ◽  
Vol 57 (1) ◽  
pp. 106-106
Author(s):  
R.G. Pridham ◽  
R.E. Kowalczyk
Keyword(s):  
Digital Filter ◽  
Filter Design ◽  
Digital Filter Design ◽  
Design Program

METEOR: a constraint-based FIR filter design program

1992 ◽  
Vol 40 (8) ◽  
pp. 1901-1909 ◽  
Author(s):  
K. Steiglitz ◽  
T.W. Parks ◽  
J.F. Kaiser
Keyword(s):  
Filter Design ◽  
Fir Filter ◽  
Design Program ◽  
Fir Filter Design
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