This paper presents a compact 2 × multiple-input multiple-output antenna system designed for 5G smartphones operating in the upper 6 GHz band, and which is to be initially considered as prototype resembling user terminal channel sounding system. The incorporates split-ring resonator metamaterial layer, enhancing its gain by at least 1.5 dB across entire bandwidth without increasing size of antenna. results show good agreement between simulations measurements, achieving strong isolation,...

This paper introduces a novel approach for estimating the complex permittivity of liquids using rectangular waveguide. The uses finite difference time domain (FDTD) method, enhanced by perfectly matched layer (PML) boundary conditions to minimize reflections and ensure accurate calculation S-parameters. To address challenge sealing waveguide ends, is sealed at both ends with resin sample known permittivity, incorporating small hole in liquid insertion. A Nelder–Mead optimization algorithm...

A 64% instantaneous bandwidth scalable turnstile-based orthomode transducer to be used in the so-called extended C-band satellite link is presented. The proposed structure overcomes current practical limitations by adding a single-step widening at junction of four output rectangular waveguides. This judicious modification, together with use reduced-height waveguides and E-plane bends power combiners, enables approach theoretical limit simple, compact design. presented architecture exhibits...

In this study, a novel Switched Beam Antenna (SBA) system is proposed and experimentally validated for C-band applications.The made up of 4 × Butler matrix, whose outputs are connected to four square-looped radiator antenna elements.The originality the work depends on construction miniaturized beamforming network with minimal complexity, low loss, expense.Moreover, designing broad frequency range enables its use in variety applications.Miniaturization achieved by eliminating crossover...

In this study, we present an implementation of Ultra Wide Band (UWB) Koch Snowflake antenna for Radio Frequency Identification (RFID) applications.The compact antenna, based on the shape, is fed by coplanar waveguide (CPW) and microstrip line with overall size 31 × 27 1.6 mm 3 .The simulation analysis performed CST Microwave Studio compared HFSS software.The design exhibits a very wide operating bandwidth 13 GHz (3.4-16.4GHz) 11 (3.5-14.577GHz) return loss better than 10 dB CPW...

In this paper, the design and analysis of a compact coplanar waveguide-fed ultra wideband pentagon antenna are presented. To achieve performance, two modiflcations introduced. The flrst one is to remove small fan angle on each side ground plan, second modify sharp patch in width. optimal dimensions can be achieved by parametric analysis. exhibits very wide operating bandwidth 16.7GHz with return loss better than 10dB frequency range from 4.46GHz 21.14GHz. gain proposed 6.3dBi. This...

The design and fabrication of an Ultra broadband square quad-ridge polarizer is discussed here. principal advantages this topology relay on both the instantaneous bandwidth axial ratio improvement. Experimental measurements exhibit very good agreement with predicted results given by Mode Matching techniques. structure provides extremely flat (AR< 0.4dB) return losses >25dB at ports over extended Ku band (= 60%). Moreover, yield analysis scaling properties demonstrate robustness against tolerances.

A >40% bandwidth fully scalable turnstile-based waveguide orthomode transducer having excellent phase performance is described for the WR75 standard rectangular waveguide. Flexible tuning achieved through use of an interchangeable stepped scattering element. Reduced height topology provides a simple, compact, and robust design against mechanical tolerances. The intrinsic broadband nature half-height E-plane bends single-step power combiners assures high order mode free increased in balanced...

In this paper, we develop a small-sized mode converter with high performance, conversion efficiency and instantaneous bandwidth as 55%.This transforms energy from the TM01 first high-order towards fundamental TE11 circular waveguide The proposed structure increases free spurious operating in comparison existing results literature.An X/Ku-bands experiment prototype unit was designed, ensuring practical return losses better than 28 dB insertion less 0.1 (conversion > 98.8%) within entire...

The design and simulation of a wideband four-port steerable beamforming networks using 4×4 Butler matrix for the 2.4 GHz applications is presented. aim this work to develop an antenna array feeding network based on with large bandwidth in order cover IEEE 802.11b/g/n band. In achieve features, uses two-section branch-line couplers four-section crossovers instead standard ones. proposed circuit exhibits high isolation designed simulated by single-layer FR-4 substrate, which covers frequency...

Abstract Dynamic spectrum access has been proposed as the effective solution to overcome scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both most important tasks in systems. In this paper, an antenna system combining sensing is be integrated into front-ends. The task performed means of ultra-wideband quasi-omnidirectional antenna. Whilst ensured using a narrowband Both antennas have designed on same layer FR4 substrate, for manufacturing cost...

The Microwave Power Transmission (MPT) is the possibility of feeding a system without contact by using microwave energy. challenge such to increase efficiency transmitted energy from emitter load. This can be achieved rectifying rectenna composed an antenna significant gain associated with rectifier good input impedance matching. In this paper, new multiband microstrip technology and fractal geometry developed. validated into simulation measurement in ISM (industrial, scientific, medical)...

A new small high-gain wideband rectangular patch antenna is proposed in this paper. The has a simple structure where the dimensions are about 11 mm by 7 1.58 leading to good bandwidth. optimized and simulated using electromagnetic commercial software, measured bandwidth defined return loss <−10 dB 1.97 GHz from 10.94 12.91 for results 2.75 covering 10.8 13.55 vector network analyser. gain up 4.91 dBi with radiation pattern. comparison between simulation measurement permits validate of...

The objective of the present study is to evaluate Specific Absorption Rate (SAR) within human head model exposed radiation planar monopole antenna with T-shaped coupling feed and an inductive shorting strip. presented design has a compact structure, configuration occupying small size 36×20mm2. Two wide bands can be generated by proposed 546 MHz (734-1280 MHz) 1066 (1934-3000 for LTE/WWAN/WLAN internal mobile phone. performance parameters comprising return loss, patterns, gain are discussed....

Abstract In this work, a simple and efficient approach to design microstrip diplexer is proposed. It based on the combination of two compact Square Open Loop Resonator band pass filters. These filters are designed for Radio Frequency Identification application at 2.45 GHz frequency. Using Chebychev approximation, designed, simulated, fabricated, measured. The results show that presents high selectivity, good insertion loss isolation (&gt;40 dB) with size. also shows performance when...

ABSTRACT A frequency tunable and bandwidth reconfigurable antenna with ring slot resonators embedded into its ground plane is presented. To achieve the reconfigurability, two PIN diodes are inserted to couple or decouple pairs of from feed line. By switching on off, can operate either in a wideband narrowband mode. In mode, varactors used continuously tune operating 2.55 3.2 GHz. Due achieved bandwidths, proposed structure cover various bands for LTE (1/2/7/33‐41 bands), WiMAX, WLAN (802.11...

In this work, a triple-band, four-element antenna is designed for fifth-generation (5 G) terminals operating in LTE band 42 (3.4–3.6 GHz), 43 (3.6–3.8 and the new 5 G radio (4.8–5.0 GHz). The proposed array consists of two different types elements: T-shaped element, which connected to feed line, C-shaped used divide bandwidth. overall size element only 10.5 mm × mm. multiantenna system has four antennas built on 0.5-mm-thick Rogers 4003C substrate. results show 10 dB measured bandwidth 650...

Wireless power transmission is a process that takes place in any system where electrical energy transmitted from source to an load without wired connection. ideal cases instantaneous or continuous transfer needed, but interconnecting wires are inconvenient, hazardous, impossible. Antenna has become the most vital element RF due its capability as radio wave transceiver. A properly designed antenna desirable ensure efficient of energy. This paper proposes square patch array 3×3 with circular...

In this paper, the design of a new compact uniplanar coplanar waveguide-fed antenna for multiband wireless application is presented and investigated. This has size 25 × mm 2 consists three parallel stub optimized added on rectangular slot to radiator patch T-shaped which inverted in ground plane. The final prototype designing resonantes at frequency bands (2.4–2.9 GHz), (3.7–5.2 (5.7–6 GHz) with return loss less than −10 dB. Details configuration, design, simulation, experimental results are...

Differential phase shifters are common circuits in communication systems where a fixed difference between two points within the circuit is required. Among available technologies, waveguide preferred for applications such as antenna feed or beam-forming networks. Typical designs literature devoted to specific delays 90° 180°, but any shift might be required, and therefore design procedure resulting mechanically-related parameter fitting equations arbitrary would advantageous. This paper...