Miniaturized Five-Band Perfect Metamaterial THz Absorber with Small Frequency Ratio

Plasmonics ◽  
2021 ◽  
Author(s):  
Vijayalakshmi Kannaiyan ◽  
Kanimozhiselvi Chenniangirivalasu Sadhasivam
Keyword(s):  
Frequency Ratio ◽  
Small Frequency

Stacked dual-band circularly polarized microstrip antenna with small frequency ratio

2014 ◽  
Vol 56 (8) ◽  
pp. 1933-1937 ◽  
Author(s):  
Sachin Kumar ◽  
Binod K. Kanaujia ◽  
Mukesh K. Khandelwal ◽  
A. K. Gautam
Keyword(s):  
Frequency Ratio ◽  
Microstrip Antenna ◽  
Dual Band ◽  
Small Frequency ◽  
Circularly Polarized

Single-feed circularly polarized stacked patch antenna with small-frequency ratio for dual-band wireless applications

2015 ◽  
Vol 8 (8) ◽  
pp. 1207-1213 ◽  
Author(s):  
Sachin Kumar ◽  
Binod K. Kanaujia ◽  
Mukesh K. Khandelwal ◽  
A.K. Gautam
Keyword(s):  
Patch Antenna ◽  
Frequency Ratio ◽  
Axial Ratio ◽  
Dual Band ◽  
Radiation Characteristics ◽  
Small Frequency ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Good Agreement

A single-feed dual-band circularly polarized stacked microstrip patch antenna with a small-frequency ratio is presented. Two pair of orthogonal slits is cut on the lower circular patch for achieving circular polarization and truncated corner square patch is used as the upper parasitic element. The frequency ratio of the dual-band is 1.03. The 3 dB axial ratio bandwidth is 1.3% for the upper band and 1.1% for the lower band. Proposed structure is fabricated on the FR-4 epoxy substrate and fed by SMA connector. The measured results are in good agreement with the theoretical and simulated results. The antenna shows stable radiation characteristics in both bands of operation.

scholarly journals A Novel Low Profile Dual-Frequency Shorted Patch Antenna

2020 ◽  
Vol 8 (5) ◽  
pp. 2469-2472
Keyword(s):  
Patch Antenna ◽  
Frequency Ratio ◽  
Single Layer ◽  
Patch Antennas ◽  
Dual Frequency ◽  
Planar Antennas ◽  
Radiation Characteristics ◽  
Small Frequency ◽  
Large Bandwidth ◽  
Low Profile

Dual-frequency planar antennas can substitute large bandwidth patch antennas, where there is a requirement for large bandwidth to cover two separate transmit receive bands. In this paper a novel single-feed, single layer, double-band, compact short loaded patch antenna is studied theoretically and experimentally. Besides the compactness, this design provides, dual frequency operation with a small frequency ratio of 1.3 between the two resonant bands. Various radiation characteristics are simulated as well as experimentally studied and good concurrence is observed between the simulated and measured results

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