Miniaturized fractal rat-race, branch-line, and coupled-line hybrids
H Ghali, TA Moselhy - IEEE Transactions on Microwave Theory …, 2004 - ieeexplore.ieee.org
In this paper, space-filling curves have been used to realize a family of miniaturized hybrids.
The large surface area occupied by a conventional structure has been significantly reduced …
The large surface area occupied by a conventional structure has been significantly reduced …
A compact wide-band rat-race hybrid using microstrip lines
M Caillet, M Clenet, A Sharaiha… - IEEE Microwave and …, 2009 - ieeexplore.ieee.org
A compact microstrip rat-race hybrid with a 50% bandwidth employing space-filling curves is
reported in this letter. The footprint of the proposed design occupies 31% of the area of the …
reported in this letter. The footprint of the proposed design occupies 31% of the area of the …
Broad-band and circularly polarized space-filling-based slot antennas
HA Ghali, TA Moselhy - IEEE transactions on microwave theory …, 2005 - ieeexplore.ieee.org
Based on the use of space-filling curves, broad-band and circularly polarized microstrip-fed
slot antennas are proposed. Broad-band performance is achieved through merging different …
slot antennas are proposed. Broad-band performance is achieved through merging different …
Design and analysis of a stub-less capacitive loaded branch line coupler with improved bandwidth performance
In this paper, a novel branch line coupler with improved bandwidth and reduced size is
presented. The size reduction is achieved by means of capacitive loading. The capacitive …
presented. The size reduction is achieved by means of capacitive loading. The capacitive …
Single-ended and balanced frequency doublers 2.45 to 4.9 GHz using GaN FETs
A Morales-Fernandez… - 2024 54th European …, 2024 - ieeexplore.ieee.org
In this work, hybrid GaN-based single-ended and balanced active frequency doubler
prototypes, from 2.45 to 4.9 GHz, have been designed. To minimize the balanced topology …
prototypes, from 2.45 to 4.9 GHz, have been designed. To minimize the balanced topology …
Coupled‐line rat‐race couplers with smooth in‐phase and out‐of‐phase performances
In this paper, a novel rat‐race coupler with smooth in‐phase and out‐of‐phase performance
is proposed. The structure is based on two sections of strong coupling coupled‐lines. A …
is proposed. The structure is based on two sections of strong coupling coupled‐lines. A …
Hybrid type rat-race coupler designs
LZ Zheng, JD Tseng, B Wu, JM Li - 2015 Asia-Pacific …, 2015 - ieeexplore.ieee.org
Two reduced size hybrid type rat-race coupler designs are presented. By using two kinds of
T-type equivalent circuits replaced the transmission lines used in rat-race coupler and …
T-type equivalent circuits replaced the transmission lines used in rat-race coupler and …
Design of fractal slot antennas
T Moselhy, H Ghali - 34th European Microwave Conference …, 2004 - ieeexplore.ieee.org
Fractal and space-filling curves are implemented for the development of fractal slot
antennas. The conventional slot is replaced by a space-filling curve having the same …
antennas. The conventional slot is replaced by a space-filling curve having the same …
Comparing miniaturization techniques for microstrip 180° hybrid ring junctions
D Psychogiou, J Hesselbarth - 2010 10th Mediterranean …, 2010 - ieeexplore.ieee.org
Several miniaturization approaches are applied to microstrip 180° hybrid ring junctions
designed for a frequency of operation of 2 GHz. These ring junctions are compared in terms …
designed for a frequency of operation of 2 GHz. These ring junctions are compared in terms …
[PDF][PDF] Dual Band Ring Couplers Using T and П Sections
MAS Alkanhal, AS Mohra - Int. J. of Microw. & Optical Tech, 2008 - researchgate.net
New rat-race couplers that can be operated at two separate frequency bands are presented.
The design is accomplished by transforming the lengths and impedances of the …
The design is accomplished by transforming the lengths and impedances of the …