scholarly journals FLEXIBLE FREQUENCY SELECTIVE SURFACE IN CONVOLUTED SQUARE FORM WITH MICROSTRIP PATCH FOR X-BAND APPLICATION

2020 ◽  
Vol 97 ◽  
pp. 97-106
Author(s):  
Palniladevi Paulpandian ◽  
Priya Dharshini Ramaraj
Keyword(s):  
Frequency Selective Surface ◽  
Microstrip Patch ◽  
X Band ◽  
Frequency Selective

scholarly journals C-Band and X-Band Switchable Frequency-Selective Surface

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 476
Author(s):  
Umer Farooq ◽  
Adnan Iftikhar ◽  
Muhammad Farhan Shafique ◽  
Muhammad Saeed Khan ◽  
Adnan Fida ◽  
...  
Keyword(s):  
Bottom Layer ◽  
Frequency Selective Surface ◽  
Transverse Magnetic ◽  
Unit Element ◽  
Angular Stability ◽  
Band Spectrum ◽  
Pin Diode ◽  
Pin Diodes ◽  
X Band ◽  
Frequency Selective

This paper presents a highly compact frequency-selective surface (FSS) that has the potential to switch between the X-band (8 GHz–12 GHz) and C-band (4 GHz–8 GHz) for RF shielding applications. The proposed FSS is composed of a square conducting loop with inward-extended arms loaded with curved extensions. The symmetric geometry allows the RF shield to perform equally for transverse electric (TE), transverse magnetic (TM), and 45° polarizations. The unit cell has a dimension of 0.176 λ0 and has excellent angular stability up to 60°. The resonance mechanism was investigated using equivalent circuit models of the shield. The design of the unit element allowed incorporation of PIN diodes between adjacent elements for switching to a lower C-band spectrum at 6.6 GHz. The biasing network is on the bottom layer of the substrate to avoid effects on the shielding performance. A PIN diode configuration for the switching operation was also proposed. In simulations, the PIN diode model was incorporated to observe the switchable operation. Two prototypes were fabricated, and the switchable operation was demonstrated by etching copper strips on one fabricated prototype between adjacent unit cells (in lieu of PIN diodes) as a proof of the design prototypes. Comparisons among the results confirmed that the design offers high angular stability and excellent performance in both bands.

scholarly journals Analysis of substrateintegrated frequency selective surface antenna for IoT applications

2020 ◽  
Vol 18 (2) ◽  
pp. 875
Author(s):  
Govardhani Immadi ◽  
M. Venkata Narayana ◽  
A. Navya ◽  
C. Anudeep Varma ◽  
A. Abhishek Reddy ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Low Cost ◽  
Frequency Selective Surface ◽  
Microstrip Patch Antenna ◽  
Iot Applications ◽  
The Past ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna ◽  
Frequency Selective ◽  
Tan Δ

<p>Antennas are long used for communication of data since a century and their usage has been diversified over the past two decades and the antennas also entered the domain of medical fields. A rectangular microstrip patch antenna has been designed on a substrate integrated waveguide with frequency selective surface which is in the shape of a square. The design of this antenna with SIW are done by using CST on a low cost FR4 substrate where є<sub>r</sub> =4.4, h=1.58 mm and tan δ=0.0035. The SIW structure merit is utilized on the traditional FSS is simulated and verified by using CST.</p>

scholarly journals Design of X-band reconfigurable frequency selective surface with high isolation

2016 ◽  
Vol 13 (16) ◽  
pp. 20160567-20160567 ◽  
Author(s):  
In-Gon Lee ◽  
Yoon-Jae Kim ◽  
Yong-Bae Park ◽  
Heung-Jae Chun ◽  
Ic-Pyo Hong
Keyword(s):  
Frequency Selective Surface ◽  
High Isolation ◽  
X Band ◽  
Frequency Selective

Frequency selective surface for X-band shielding applications

2016 ◽  
Author(s):  
Muhammad Bilal ◽  
Rashid Saleem ◽  
Faisal Ahmad Khan ◽  
Asim Quddus ◽  
Muhammad Farhan Shafique
Keyword(s):  
Frequency Selective Surface ◽  
X Band ◽  
Frequency Selective

Design of dual-polarized and angular stable new bandpass frequency selective surface in X-band

2015 ◽  
Vol 61 (3) ◽  
pp. 559-567 ◽  
Author(s):  
Garima Bharti ◽  
Kumud Ranjan Jha ◽  
Ghanshyam Singh ◽  
Rajeev Jyoti
Keyword(s):  
Frequency Selective Surface ◽  
X Band ◽  
Frequency Selective ◽  
Dual Polarized

X-Band Tunable Frequency Selective Surface Using MEMS Capacitive Loads

2015 ◽  
Vol 63 (3) ◽  
pp. 1014-1021 ◽  
Author(s):  
Mojtaba Safari ◽  
Cyrus Shafai ◽  
Lotfollah Shafai
Keyword(s):  
Frequency Selective Surface ◽  
X Band ◽  
Frequency Selective ◽  
Tunable Frequency
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