scholarly journals Dual band, low profile and compact tunable frequency selective surface with wide tuning range

2018 ◽  
Vol 123 (23) ◽  
pp. 235301 ◽  
Author(s):  
Yazdan Rahmani-Shams ◽  
Sajad Mohammd-Ali-Nezhad ◽  
Ali Nooraei Yeganeh ◽  
Seyed Hassan Sedighy
Keyword(s):  
Tuning Range ◽  
Frequency Selective Surface ◽  
Dual Band ◽  
Wide Tuning Range ◽  
Low Profile ◽  
Frequency Selective ◽  
Tunable Frequency

scholarly journals Novel Cross-Type Network for Wide-Tuning-Range Reconfigurable Multiband Antennas

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Chieh-Sen Lee ◽  
Chi-Lin Tsai ◽  
Chin-Lung Yang
Keyword(s):  
Radiation Pattern ◽  
Tuning Range ◽  
Ultra Wideband ◽  
Dual Band ◽  
Wide Tuning Range ◽  
Function Type ◽  
Tunable Antenna ◽  
Tunable Frequency ◽  
Frequency Ratios ◽  
Cross Type

This paper presents a cross-type network design with a novel reconfigurable functionality to realize a tunable multiband antenna. By attaching a reconfigurable network at the feeding port of a broadband antenna, multi-input impedance adjustment enables the production of multimatching operating bands. Each band can be independently controlled by a single component with a considerably wide tuning range and high selectivity. The experiments in this study involved using an ultra-wideband (UWB) antenna connected to the proposed cross-type network. The tunable antenna operates in a dual band offL(1.39 to 2.34 GHz) andfH(2.1 to 3.6 GHz) with tunable frequency ratios of 168% and 132%, respectively. The average bandwidths atfLandfHare approximately 50 MHz and 148 MHz, respectively, implying narrowband operation. The measured radiation pattern revealed that the tunable antenna exhibits a nearly omnidirectional radiation pattern at both 1.8 and 3.5 GHz. The network circuit architecture can be extended to the multiband function type by adopting this matching approach. The amount of shunt matches determines the number of operation bands.

Dual-Band Band-Pass Frequency Selective Surface Based on the Matryoshka Geometry with Angular Stability and Polarization Independence

2020 ◽  
Author(s):  
Alfredo Gomes Neto ◽  
Jefferson Costa e Silva ◽  
Alexandre Jean Rene Serres ◽  
Marina de Oliveira Alencar ◽  
Ianes Barbosa Grecia Coutinho ◽  
...  
Keyword(s):  
Frequency Selective Surface ◽  
Angular Stability ◽  
Dual Band ◽  
Band Pass ◽  
Frequency Selective
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