In this paper, an ultra-wideband (UWB) monopole antenna with penta-notched rejection characteristics is proposed. The first three rejected bands, 2.6 GHz (LTE band), 4.0 GHz (C-band satellite downlink), and 8.0 GHz (X-band satellite uplink), are obtained using two fork-shaped slots embedded on the radiating patch, respectively. However, additional two notched frequencies for 5.5 GHz (WLAN band) and 6.5 GHz (C-band IEEE INSAT) applications are achieved by spiral line electromagnetic bandgap (EBG) structures. The designed antenna is fabricated over FR4 substrate and has a compact size of 31.3 × 34.9 × 1.6 mm 3 and is covering the impedance bandwidth of 2.9-10.5 GHz. Moreover, the suggested antenna has efficient notch controlling capabilities, and its performance characteristics are evaluated and analyzed in terms of rejecting frequencies, surface current distributions, radiation patterns, etc.
In this article, a planar monopole penta‐notched ultra‐wideband (UWB) antenna is designed and investigated. Three notches (2.81 GHz radar surveillance, 3.38 GHz WiMAX, and 3.87 GHz C‐band satellite downlink) have been realized by integrating three modified U‐shaped slots on the radiating surface. Furthermore, to create two additional notches (2.33 GHz ISM band and 5.75 GHz WLAN), two meander line electromagnetic bandgap (EBG); one located near to the feed line and another on the radiating surface, have been introduced in the design. These unit cells play a fundamental role in generating notches at higher as well as lower frequencies. The proposed antenna possesses an overall size of 34.9 × 31.3 × 1.6 mm3 and has been designed over FR4 substrate. A 50 Ω microstrip line is used to feed the antenna. The antenna without any extra arrangement exhibits an impedance bandwidth of 7.6 GHz. A parametric analysis is studied in detail to observe the band rejection characteristics. The ANSYS HFSS simulation software is used for simulating the proposed design structures. For validation purpose, a prototype is fabricated and characterized. A very good agreement is achieved between simulated and measured results.
This study presents a novel configuration of a cuboidal quad-port ultra-wideband multiple-input and multiple-output antenna with WLAN rejection characteristics. The designed antenna consists of four F-shaped elements backed by a partial ground plane. A 50 Ω microstrip line is used to feed the proposed structure. The geometry of the suggested antenna exhibits an overall size of 23 × 23 × 19 mm3, and the antenna produces an operational bandwidth of 7.6 GHz (3.1–10.7 GHz). The notched band characteristic at 5.4 GHz is accomplished by loading a pair of spiral electromagnetic bandgap structures over the ground plane. Besides this, other diversity features such as envelope correlation coefficient, and diversity gain are also evaluated. Furthermore, the proposed antenna system provides an isolation of −15 dB without using any decoupling structure. Therefore, to validate the reported design, a prototype is fabricated and characterized. The overall simulated performance is observed in very close agreement with it's measured counterpart.
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