A low-cost coplanar waveguide fed compact ultrawideband (UWB) antenna with band rejection characteristics for wireless local area network (WLAN) is proposed. The notch characteristic achieved by etching half wavelength C-shaped annular ring slot in the radiating patch. By properly choosing radius and position of slot, can be adjusted controlled. With an overall size 18.7 mm × 17.6 mm, turns out to one smallest UWB antennas band-notched characteristics. It has a wide fractional bandwidth 130%...

This article presents printed log periodic antennas with metamaterials for use in microwave imaging. A single layer of epsilon negative (ENG) metamaterial (MTM) array (1 × 6) the unit cell is on radiating patch. Adding a structure enhances properties far-field antennas, such as radiation pattern and gain, both which are vital breast Two frequency bands exhibit permittivity: 3–3.3 GHz 3.6–4.5 GHz. In operating band, proposed have achieved maximum gain 5.5 dBi impedance bandwidth 3 (2–5 GHz)...

In this paper, an effective system for microwave imaging of breast tumor detection using modified 16-planar log periodic antenna (PLPA) array is presented. The PLPA operates in the band from 2 to 5 GHz with stable directional patterns end-fire direction. Once results a single element have been validated, design extended include 16 elements. All transceiver antennas are vertically placed around phantom circular manner where one acts as transmitter and rest work receivers. Delay Sum (DAS)...

A proximity-coupled graphene patch-based full-duplex antenna is proposed for terahertz (THz) applications. The provides a 10 dB impedance bandwidth of 6.06% (1.76 − 1.87 THz). input ports the design are isolated from each other by −25 dB. aspect ratio graphene-based radiating patch and physical parameters selected obtaining single-mode operation. dimensions (length width graphene) have been opted to operate in two higher-order orthogonal modes, these modes remain intrinsically isolated....

ABSTRACT In this article, a simple, low cost, and compact‐printed monopole ultrawideband (UWB) antenna with band‐notch characteristics is proposed. The operates from 3 to 11.2 GHz covering the UWB band (3.1–10.6 GHz), while rejecting frequency 5.15–5.825 GHz, which limited by IEEE 802.11a. proposed has small size of 26 × 31 mm 2 designed on an FR4 substrate permittivity (ε r ) 4.5 having thickness 1.52 mm. A parametric study performed understand effects parameters its performance. good...

Abstract The authors present a novel self‐diplexing antenna (SDA) designed using substrate‐integrated waveguide (SIW) technology. features planar‐backed cavity with radiating slot and two input ports tuned to produce resonances in the operating band for enhanced bandwidth. design is simple easy implement, similar radiation characteristics across Experimental validation of shows good agreement simulated matching, frequency channels X‐band (8.21−8.47 GHz 9.42−9.764 GHz). SDA's stable wideband...

A novel low-profile inset-fed ultrawideband printed antenna with triple band-notched characteristics is proposed. Wide inverted U-shaped and crescent-shaped slots are used to achieve first second notched bands in the 3.3--3.7 GHz 5.1--5.9 ranges for WiMAX WLAN systems, respectively. Additionally, an altered ground plane open-ended L-shaped slot generated a third band 7.25--7.85 range downlink of X-band satellite communication systems. The center frequencies stop adjusted by altering...

A compact printed MIMO antenna with an area of 18.7 mm × 45.2 and impedance bandwidth 129% (based on −10 dB criteria) is presented for UWB applications. The consists two identical patch elements which are placed the same substrate a rectangular microstrip in between. inclusion improves isolation maintains overall mutual coupling less than −21 (−26 most band) over entire band. proposed operates frequency band ranging from 2.8 GHz to 13 covers stable radiation patterns. return loss obtained...

A coplanar waveguide (CPW) - fed compact cupcake shaped printed antenna is proposed for UWB applications. Cupcake structure formed by capping an ellipse (eccentricity = 0.95) over a semicircle (radius 12mm). The bandwidth enhanced loading the semicircular patch and using CPW ground plane. parameters are simulated optimized Ansoft HFSS electromagnetic simulator. design fabricated LPKF (S103) prototyping machine on 27 mm× 28 mm FR4 substrate ε <sub...

In this paper, a compact MIMO antenna with improved isolation is proposed for WLAN applications. The overall dimension of the only 35 mm × 62 mm. Two identical monopole patch antennas are backed by modified ground plane. Three rectangular cuts on each element along plane responsible higher about 40 dB at 5.5 GHz. prototype printed FR4 substrate (ε <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> =4.4, tanδ=0.02) thickness 1.5 measured...

There is an urgent need for high-capacity connection with high data transfer rate in densely populated areas due to the rapid growth of mobile communication technologies and explosion traffic. Multi beam antennas have generated a lot research interest been extensively explored base station applications their ability boost capacity sustain rate. Multi-beam based on Butler matrices (MABBMs) are also appropriate because advantages gain, simple design, low profile. This paper's goal give summary...

Here, a compact, dual band, 4-elements multi-input and multi-output (MIMO) antenna diplexer is designed to use in wireless local area network (WLAN) applications. The accomplished planar profile by employing Substrate Integrated Waveguide (SIW) technology. To reduce the size of single element 75%, quarter-mode substrate integrated waveguide (QMSIW) technology introduced. QMSIW realized bisecting full-mode SIW along two magnetic walls considering for operation. Initially, two-QMSIW cavities...