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The Smallest Form Factor UWB Antenna with Quintuple Rejection Bands for IoT Applications Utilizing RSRR and RCSRR

Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Korea
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Sensors 2018, 18(3), 911; https://doi.org/10.3390/s18030911
Received: 22 December 2017 / Revised: 3 March 2018 / Accepted: 16 March 2018 / Published: 19 March 2018
(This article belongs to the Section Remote Sensors, Control, and Telemetry)
In this paper, we present the smallest form factor microstrip-fed ultra-wideband antenna with quintuple rejection bands for use in wireless sensor networks, mobile handsets, and Internet of things (IoT). Five rejection bands have been achieved at the frequencies of 3.5, 4.5, 5.25, 5.7, and 8.2 GHz, inseminating four rectangular complementary split ring resonators (RCSRRs) on the radiating patch and placing two rectangular split-ring resonators (RSRR) near the feedline-patch junction of the conventional ultra-wideband (UWB) antenna. The design guidelines of the implemented notched bands are provided at the desired frequency bands and analyzed. The measured results demonstrate that the proposed antenna delivers a wide impedance bandwidth from 3 to 11 GHz with a nearly omnidirectional radiation pattern, high rejection in the multiple notched-bands, and good radiation efficiency over the entire frequency band except at the notched frequencies. Simulated and measured response match well specifically at the stop-bands. View Full-Text
Keywords: UWB antenna; rejection bands; rectangular complementary split ring resonator (R-CSRR); rectangular split-ring resonator (RSRR); Internet of things (IoT) UWB antenna; rejection bands; rectangular complementary split ring resonator (R-CSRR); rectangular split-ring resonator (RSRR); Internet of things (IoT)
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Rahman, M.; Park, J.-D. The Smallest Form Factor UWB Antenna with Quintuple Rejection Bands for IoT Applications Utilizing RSRR and RCSRR. Sensors 2018, 18, 911.

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