A novel coplanar waveguide-fed broadband dual circularly polarized square slot antenna is presented. The consists of a slot, two asymmetric T-shaped feed lines in orthogonal direction protrude from signal lines, and an inverted-L grounded strip with three straight strips at the corner adjacent to both lines. circular polarization obtained due Axial ratio (AR) bandwidth significantly enhanced because attached strips. 3-dB AR about 60% which return loss, isolation are better than 10 15 dB,...

A novel design of a dual-band and dual-sense circularly polarized coplanar-waveguide-fed monopole antenna with two rectangular parasitic elements an I-shape grounded stub is presented here. The consists vertical horizontal section. Lower band obtained due to 90° phase difference between currents in the orthogonal branches monopole. Upper stub. Parasitic help input impedance matching. provides wide 10-dB bandwidth 71.63% at 2.82 GHz. 3-dB axial-ratio bandwidths are 27.45% 2.55 GHz (right-hand...

A four‐port MIMO antenna design focused on the sub‐6 GHz fifth generation wireless communication application is presented. The does not need any other decoupling structure for achieving isolation between multiple ports. combination of four single wideband units results in formation a circular‐shaped metallic disc ground plane proposed antenna. This acts as pool current with 180° phase difference leading to various Diversity performance shown help an envelope correlation coefficient using...

This article presents a coplanar waveguide fed global system for mobile communications band integrated ultra wide (UWB) multiple input output (MIMO) antenna with single and dual notch characteristics. The novelty of the lies in its design as all unit cells proposed UWB MIMO structure are orthogonal to each other therefore additional isolation elements responsible achieving high not required consequently making simple easy fabricate. In this context, 2 systems have been designed. first is...

This letter presents a novel proximity-coupled multiband microstrip patch antenna. The proposed antenna simultaneously operates at Bluetooth (2.4-2.485 GHz), WiMAX (3.3–3.7 and WLAN (5.15–5.35 5.725–5.85 GHz) bands with consistent radiation pattern uniform gain. is two-layer design. A V-shaped rectangular strip on the top layer fed by buried in middle proximity coupling. Furthermore, resonating parasitic structures bottom plane are used to improve characteristics. fabricated has small size...

This letter presents a new design of multiband microstrip antenna with proximity-coupled feed for operating in the LTE2300 (2300–2400 MHz), Bluetooth (2400–2485 WiMAX (3.3–3.7 GHz), and WLAN (5.15–5.35 GHz, 5.725–5.825 GHz) bands. In addition, it also covers 6-dB impedance bandwidth across UMTS (1920–2170 MHz) band. The proposed consists corner-truncated rectangular patch slot, meandered feed, defected ground plane. is fabricated using 0.8-mm-thick FR4 substrate dielectric constant 4.4 has...

This letter presents a novel dual-band circularly polarized slot antenna. The far-field polarization of the antenna can be switched electronically between left-hand circular and right-hand polarization. A 50 Ω microstrip feed line is divided into four arms those excite ground plane slot. p-i-n diodes are introduced in for switching. prototype dual-sense with f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> = 2.4 GHz...

In this letter, a simple compact dual-polarized ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna is presented with the circularly polarized band for WiMAX (5.5 GHz) and WLAN (5, 5.2 applications. The parameters such as reflection coefficient, diversity performance, gain, axial ratio, isolation have been studied on fabricated prototype of proposed antenna. 3 dB axial-ratio bandwidth (ARBW) 34.38% along between two ports has achieved by introducing rectangular vertical arm...

In this letter, a novel substrate integrated waveguide (SIW) cavity-backed self-triplexing slot antenna is proposed for triple-band communication. It realized on single-layer printed circuit board. The consists of pair bow-tie slots etched an SIW cavity, and three different resonant modes are excited by two microstrip lines coaxial probe to operate at distinct frequencies (7.89, 9.44, 9.87 GHz). band around 9.48 GHz obtained due radiation from one fed adjacent feedline other its feedline. On...

This letter presents a simple microstrip-line-fed wideband polarization-reconfigurable antenna (PRA). A circular metal ring with gaps and modified ground plane is first designed for polarization (CP). Two p-i-n diodes are then introduced to control the states. Left-hand CP, right-hand linear (LP) can be obtained by controlling biasing state of diodes. prototype fabricated tested C-band application. Measured results show that achieves wide effective bandwidth over 3.79-7.82 GHz (both |S11| ≤...

In this work, two configurations (Config.-A and Config.-B) of planar four-port dual circularly-polarized (CP) multiple-input-multiple-output (MIMO) antenna are proposed for sub-6 GHz (3.4-3.8 GHz) applications. The MIMO antennas designed on the FR-4 substrate with size $60\times 60\times 1.6$ mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . Each radiating element (unit cell) is comprised a microstrip feed line an open slot ground...

In this study, a compact ultrawideband (UWB) multiple‐input–multiple‐output (MIMO) antenna with reconfigurable band notch characteristics is presented. The key feature of the its novel dual‐band technique which blocks worldwide interoperability for microwave access or wireless local area network interference. UWB‐MIMO property achieved by two square monopoles separated grounded multi‐branch T‐shaped stub. operation performed PIN diodes integrated in parasitic resonant structure ground plane....

In this communication, three novel self-diplexing circularly polarized (CP) antenna configurations are presented in substrate integrated waveguide (SIW) technology for dual-band communication systems. The antennas provide left-hand circular polarization (LHCP), right-hand (RHCP), and different sense of at two bands. An asymmetric cross-slot on top a rectangular SIW cavity is used as the basic radiator. A polarizations over bands obtained by changing feed position slot orientation. CP can be...

In this study, an 8‐port multibeam ultrawideband multi‐input–multi‐output (UWB‐MIMO) antenna having pattern and polarisation diversity is investigated for Wireless Personal‐Area Network access points. The proposed consists of two different types slot radiators, each them provides four directive beams. novelty the design achievement a compact UWB‐MIMO using common ground plane. Eight additional grounded slits are used in to enhance isolation. Antenna elements placed such way that adjacent...

This communication presents a compact self-quadruplexing substrate integrated waveguide (SIW) cavity-backed slot antenna for quad-band services. The proposed uses four V-shape slots of different lengths radiation. Each is backed by quarter-mode SIW cavity, which excited 50 Ω microstrip line. band positions can be independently controlled. A prototype with the radiating frequencies 8.19, 8.8, 9.71, and 11 GHz fabricated. has more than 22 dB measured isolation among ports. Measured maximum...

In this letter, a simple, planar monopole antenna is proposed to achieve compound reconfigurability. Reconfigurable properties of operating frequency,polarization, and radiation pattern are achieved by the structural reconfiguration both element ground plane with help only 8 p-i-n diodes. The tilting can be reconfigured in between -30° +30°. each direction, frequency sub-6 GHz band for future 5G application centered around 3.5 WLAN 5.5 GHz. Circularly polarized radiations having opposite...

In this letter, a broadband dual circularly polarized substrate integrated waveguide (SIW) antenna is proposed. The proposed consists of quarter mode SIW cavity, two open-stubs and defected ground structures (DGSs). has ports. One them provides left-hand circular polarization the other right-hand polarization. Circular obtained from TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">202</sub> resonator. cavity loaded with perpendicular at corner...

In this communication, three self-quadruplexing circularly polarized (CP) antennas are presented in substrate integrated waveguide (SIW) technology for quad-band wireless services. The proposed radiate from four unequal length T-shape slots etched on a square SIW cavity. excited by microstrip lines. slot placed at each corner of the cavity creates orthogonal electric fields having 90° phase difference, which leads to CP radiation. first antenna provides left hand circular polarization...

A new compact three-dimensional multiple-input-multiple-output (MIMO) antenna comprised of eight elements is presented. The unit cell the proposed MIMO/diversity consists three elliptical rings connected together in region close to feed line and a rectangular-shaped modified ground plane. To achieve polarization diversity with eight-port MIMO configuration, four are horizontally arranged remaining vertically oriented. has an impedance bandwidth (S11 < −10 dB) 25.68 GHz (3.1-28.78 GHz)...

In this letter, a novel design of compact self-triplexing antenna using half-mode substrate integrated waveguide (HMSIW) cavity for triple-band applications is presented. the proposed antenna, an inverted V-shaped slot inserted on top surface rectangular HMSIW and three individual microstrip feedlines are used to excite separate modes at different wireless local area network (WLAN) bands around 4.95, 5.3, 5.9 GHz. Due use cavity, size has become compact. The measured isolation in between any...