Modified dual-mode double-ring resonators for wide band-pass filter design

2005 ◽  
Vol 152 (4) ◽  
pp. 245 ◽  
Author(s):  
T.-W. Soong ◽  
J.-C. Liu ◽  
C.-H. Shie ◽  
C.-Y. Wu
Keyword(s):  
Filter Design ◽  
Wide Band ◽  
Ring Resonators ◽  
Band Pass Filter ◽  
Dual Mode ◽  
Pass Filter ◽  
Double Ring ◽  
Band Pass

Dual-mode double-ring resonators for microstrip band-pass-filter applications

2004 ◽  
Vol 151 (5) ◽  
pp. 430 ◽  
Author(s):  
J.C. Liu ◽  
P.C. Lu ◽  
C.H. Shie ◽  
C.S. Cheng ◽  
L. Yao
Keyword(s):  
Ring Resonators ◽  
Band Pass Filter ◽  
Dual Mode ◽  
Pass Filter ◽  
Double Ring ◽  
Band Pass

Dual-mode double-ring resonator for microstrip band-pass filter design

2003 ◽  
Vol 36 (4) ◽  
pp. 310-314 ◽  
Author(s):  
Ji-Chyun Liu ◽  
Chin-Shen Cheng ◽  
Leo Yao
Keyword(s):  
Ring Resonator ◽  
Filter Design ◽  
Band Pass Filter ◽  
Dual Mode ◽  
Pass Filter ◽  
Double Ring ◽  
Band Pass

Improved RF Metamaterial Band-Pass Filter Design Using CSRR Structures on LCP Substrate

2015 ◽  
Vol 2015 (DPC) ◽  
pp. 001016-001047
Author(s):  
Christopher James ◽  
Robert N. Dean
Keyword(s):  
Frequency Response ◽  
Filter Design ◽  
Ring Resonators ◽  
Band Pass Filter ◽  
Split Ring ◽  
Pass Filter ◽  
Signal Line ◽  
Low Pass ◽  
Band Pass ◽  
High Pass

In the past decade, the emergence of man-made structures with unusual electromagnetic properties not seen in nature—commonly known as “metamaterials”—has generated much interest in designing filters, antennas, lenses, and other devices based on negative values of permittivity (ε) and permeability (μ). Manipulating negative values of these electromagnetic parameters has found applications in communication technology and cloaking research by taking advantage of interesting phenomena such as a negative index of refraction and the reverse Doppler Effect. RF and microwave filters with different frequency responses (low-pass, high-pass, band-pass, and band-stop) can be realized by varying microstrip signal line shapes at a frequency of interest due to the fact that the metamaterial frequency response is dependent on the physical dimensions of the structures. For example, the center frequency of a filter can be determined by adjusting the physical dimensions of metamaterial building blocks called split-ring resonators (SRR) or their duals, complementary split-ring resonators (CSRR). To further metamaterial applications, however, non-planar surfaces and effects of curvature on frequency response must also be considered. In this work, an RF metamaterial filter is presented to demonstrate an improvement in the band-pass frequency response from a previous design at Auburn University by enhancing the upper band behavior of the filter. This is achieved by modifying the metamaterial design on the microstrip device to incorporate new additions to the signal line to combine both high-pass and low-pass metamaterial design concepts, resulting in a band-pass response. The filter is designed using a liquid crystal polymer (LCP) slab as a substrate due in part to its dielectric properties, but also to investigate the filter's performance on a flexible structure. An exploration into the roles of different signal line and CSRR dimensions in filter design is given, and a microstrip filter designed using ANSYS HFSS is shown along with simulation results to verify band-pass filter response. LCP was selected due to its excellent RF properties, its resistance to moisture absorption, and its ability to be micromachined.

A TUNABLE HETERODYNE FILTER DESIGN ON RECONFIGURABLE FABRIC

2004 ◽  
Vol 13 (05) ◽  
pp. 981-998 ◽  
Author(s):  
SANJAY SHARMA ◽  
R. C. CHAUHAN ◽  
SANJAY ATTRI
Keyword(s):  
Filter Design ◽  
Notch Filter ◽  
Wide Band ◽  
Band Pass Filter ◽  
Narrowband Interference ◽  
Pass Filter ◽  
Gate Arrays ◽  
Band Pass ◽  
Reconfigurable Fabric ◽  
High Pass

This paper presents the design of tunable heterodyne filter that can be used very effectively in the elimination of narrowband interference in wide-band communications. The filter makes use of the heterodyne process to create a tunable notch filter from a fixed coefficient high-pass filter. It has been shown that it is possible to generate a signal that can be used to set the heterodyne frequency to match the tunable heterodyne notch filter to the center of the detected interference through the use of a simple second order IIR band-pass filter to detect the narrowband interference. Moreover various options have been illustrated for the implementation of heterodyne filters using Xilinx Virtex field programable gate arrays (FPGAs).

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