Single-Balanced Diode Mixer Using Defected Ground Structure for Harmonic Suppression

2006 ◽  
Author(s):  
Dussadee Dokkaew ◽  
Alongkom Namahoot ◽  
Vech Vivek
Keyword(s):  
Harmonic Suppression ◽  
Defected Ground Structure ◽  
Ground Structure

scholarly journals A Compact Wideband Dual-Polarized Antenna with Harmonic Suppression Using Nonuniform Defected Ground Structure

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Lana Damaj ◽  
Anne-Claire Lepage ◽  
Xavier Begaud
Keyword(s):  
Coplanar Waveguide ◽  
Stop Band ◽  
Harmonic Suppression ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Complete Structure ◽  
Harmonic Rejection ◽  
Compact Size ◽  
Dual Polarized ◽  
Band Characteristic

A wideband dual-polarized coplanar waveguide (CPW) fed antenna integrating a wide stop-band filter is presented. The designed filter is based on a nonuniform defected ground structure (DGS) in order to obtain a wide stop-band and a compact size. This filter is used to reject harmonics and spurious radiation arising from the RF front end. The complete structure (antenna and filter) has been optimized to have a compact size of0.6×0.6λ02(λ0being the free-space wavelength at the lowest operating frequency). The realized antenna operates in the frequency range between 2.7 GHz and 5.9 GHz (bandwidth of about 74%). The isolation between feeding ports is more than 18 dB. The complete structure has a wide stop-band characteristic (103%) for harmonic rejection. The simulated numerical results have been confirmed with measurements.

scholarly journals A Bandpass Filter Based on Half Mode Substrate Integrated Waveguide-to-Defected Ground Structure Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Yong Mao Huang ◽  
Zhenhai Shao ◽  
Zhaosheng He ◽  
Chang Jiang You ◽  
Di Jiang
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Second Harmonic ◽  
Substrate Integrated Waveguide ◽  
Harmonic Suppression ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
X Band ◽  
Compact Size ◽  
Low Insertion Loss

A half mode substrate integrated waveguide-to-defected ground structure (HMSIW-DGS) cell and its embedded form are proposed to miniaturize a bandpass filter. Both cells can purchase wideband frequency response and low insertion loss, as well as simple and easy fabrication. By cascading two of them according to design requirement, an X-band bandpass filter is designed and measured to meet compact size, low insertion loss, good return loss, second harmonic suppression, and linear phase.

scholarly journals A design of wideband high-power 3-dB quadrature coupler using defected ground structure for status data transmitting system

2020 ◽  
Vol 9 (1) ◽  
pp. 198-204
Author(s):  
The Anh Nguyen Dinh ◽  
Long Hoang Duc ◽  
Duong Bach Gia ◽  
Dragos Dancila
Keyword(s):  
High Power ◽  
Return Loss ◽  
Wide Band ◽  
Harmonic Suppression ◽  
Frequency Range ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
The Status ◽  
Status Data ◽  
Better Than

The paper presents a wideband 3-dB quadrature coupler designed for operation at 2 GHz. The presented coupler is based on a broadside-coupled suspended structure in combination with a proposed defected ground structure (DGS) allowing for high power, wide-band and improved harmonic suppression performance. The experimental results show 0.2 dB of insertion loss, return loss of better than 18 dB and isolation of better than 25 dB in the frequency range from 1.74 to 2.67 GHz. The proposed coupler is able to be integrated in the status data transmitting system, which is suitable for vessel monitoring. The fundamental characteristics of the implemented coupler have been measured and verified.

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