Large-bandwidth flat cylindrical array with circular polarisation and omnidirectional radiation

1979 ◽  
Vol 15 (4) ◽  
pp. 102 ◽  
Author(s):  
G. Dubost ◽  
J. Samson ◽  
R. Frin
Keyword(s):  
Circular Polarisation ◽  
Large Bandwidth ◽  
Cylindrical Array

scholarly journals Waveguide divider design based on null of electric field

2021 ◽  
Author(s):  
Leonardo Zappelli
Keyword(s):  
Electric Field ◽  
Theoretical Approach ◽  
Initial Point ◽  
Transmission Band ◽  
Geometric Parameters ◽  
Transmitted Power ◽  
Matching Network ◽  
Large Bandwidth ◽  
Input Matching ◽  
Thin Band

AbstractNowadays, the design of dividers is based on electromagnetic software that optimizes some geometric parameters to obtain the required performance. The choice of the geometry of the discontinuities contained in the divider and of the optimization initial point is quite critical to satisfy the divider requirements. In the last years, it is quite rare to find in the literature a theoretical approach helping the designers in the choice of the divider geometry. Helpful suggestion can derive by the analysis of the electric field in a trial divider that satisfies power division among the output ports in a thin band. In fact, the electric field null can be filled with metallic septa that ensure the same behavior at any frequency. The optimization of the septa position/form with numerical electromagnetic software permits to obtain divider with large bandwidth. A further analysis of the electric field null in the divider permits to add lateral metallic septa that further enlarge the transmission band. Finally, the design of an input matching network increases the transmitted power to the desired value.

Millimeter-Wave Dual-Band Bandpass Filter With Large Bandwidth Ratio Using GaAs-Based Integrated Passive Device Technology

2021 ◽  
Vol 42 (4) ◽  
pp. 493-496
Author(s):  
Guangxu Shen ◽  
Wenjie Feng ◽  
Wenquan Che ◽  
Yongrong Shi ◽  
Yiming Shen
Keyword(s):  
Millimeter Wave ◽  
Bandpass Filter ◽  
Dual Band ◽  
Passive Device ◽  
Large Bandwidth ◽  
Device Technology

New printed antenna and array with circular polarisation

1996 ◽  
Vol 32 (9) ◽  
pp. 785 ◽  
Author(s):  
A. Nešić ◽  
I. Radnović ◽  
M. Mikavica
Keyword(s):  
Printed Antenna ◽  
Circular Polarisation

1.5-μm InGaAsP-InP multigain-levered-MQW-DFB-LD with high-efficiency and large-bandwidth FM response

1995 ◽  
Vol 1 (2) ◽  
pp. 516-522
Author(s):  
Jong-In Shim ◽  
H. Olesen ◽  
H. Yamazaki ◽  
M. Yamaguchi ◽  
M. Kitamura
Keyword(s):  
High Efficiency ◽  
Large Bandwidth

Backscattering for circular polarisation

1966 ◽  
Vol 2 (9) ◽  
pp. 341 ◽  
Author(s):  
M.W. Long
Keyword(s):  
Circular Polarisation
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