A compact low-cost low-power smart antenna has been proposed in this paper. To reduce the cost and power consumption, it employs structure of an Electronically Steerable Parasitic Array Radiator (ESPAR) antenna. size antenna, a top-disk loaded monopole six folded monopoles are employed as driven element parasitic elements, respectively. The is called “folded ESPAR antenna”. heights reduced to be less than . Furthermore, radius by using capacitive loading technique. An equivalent circuit...

This paper presents a compact-size, low-cost smart antenna with electronically switchable radiation patterns, and reconfigurable polarizations. can be dynamically switched to realize three different polarizations including two orthogonal linear one diagonally polarization. By closely placing several parasitic elements around the driven antenna, beam switching achieved in any of polarization states. In this design, square patch simple feeding network is used as element. The element composed...

In this paper, a phased array antenna is designed at millimeter-wave frequency bands for future 5G based smartphone applications. The proposed novel open slot-PIFA made on low cost FR4 board. covers range of 26-32 GHz with bandwidth 6 GHz. exhibits very good radiation pattern when integrated the mobile phone chassis. 8-element maximum gain around 13 dBi. can be steered by varying phase shift each element.

Gain reference antenna is an important part of over-the-air (OTA) measurement system using gain substitution method. Without accurate antenna, the results such are envisaged to lead a biased evaluation gain. Furthermore, might be susceptible undesirable currents on coaxial cable during whereby actual measured radiation pattern can distorted causing significant differences from its expected pattern. These known as common-mode (CM) current. In this work, novel dipole (GRDA) with minimal CM...

A frequency-reconfigurable antenna for a multiple-input–multiple-output (MIMO) system with electronically steerable radiation patterns in azimuth plane is proposed this letter. For MIMO systems, the are able to reduce correlation between signals and increase channel capacity. There two folded-monopole parasitic array radiator (FM-ESPAR) antennas The pattern of each FM-ESPAR from 0 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"...

In this paper, a novel two-port dual-band multiple-input-multiple-output (MIMO) antenna with enhanced isolation and high gain is presented. The presented composed of symmetrical ground element two identical radiating elements. At the bottom substrate, part applied to strengthen performance designed MIMO antenna. measured −10 dB bandwidth according input reflection coefficient S11 are 650 MHz (2.25–2.9 GHz) 980 (5.05–6.03 GHz), which in strong agreement 2.4 GHz frequency band (2.4–2.4835 5...

Millimeter wave (mm-wave) antenna array systems with high-gain beam-steerable capability play a key role in fulfilling the high data-rate demands of 5G and beyond wireless technologies. Rigorous calibration is essential to ensure that their radiation performance fulfills standard requirements before massive rollout. These tests will exclusively transition over-the-air (OTA) testing approaches antennas included due lack connectors compact highly integrated designs emerging mm-wave radio...

A low-cost compact dual-band antenna that can achieve electronic beam steering in the horizontal plane across a range from 0 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">°</sup> to 360 and adaptive beamforming is presented. Multiple radiation patterns be generated by for interference canceling. To reduce size cost, employs configuration of electronically steerable parasitic array radiators (ESPARs). The elements are 12 folded monopole...

A small director array (SDA) is an antenna gain enhancing section of the low-profile smart which can be used as a fixed or reconfigurable using switched parasitic elements. Gain improvements up to +10 dBi are achieved in SDA through Yagi-Uda configuration elements with large diameter. The height reduced by 50% comparing standard antenna. electronically steerable arrangement so that beam steered from 0° 360° horizontal plane. 0.2 λ. measurements proved increase 3 dB. front back ratio showed...

To deploy effective communication systems in vehicle cavities, it is critical to understand the time variation of in-vehicle channel. Initially, rapid channel addressed, which characterized frequency domain as a Doppler spread. It then shown that, for typical spreads, underspread, and therefore, information capacity approaches achieved with perfect receiver state infinite bandwidth limit. Measurements are performed number scenarios (e.g., absorptive motion, reflective one antenna moving,...

This paper reports on the development and testing of a wideband spiral-shaped coupler for partial discharge (PD) detection in UHF spectrum. The design, which is based log-periodic spiral slot antenna, has been optimized using finite element simulation. following parameters have optimized: feed location, arm termination shape, width root, termination. unique feature inclusion tuning nodules arms, widen its bandwidth without need additional components. Tests an anechoic chamber shown close...

Millimeter wave (mmWave) systems with effective beamforming capability play a key role in fulfilling the high data-rate demands of current and future wireless technologies. Hybrid analog-to-digital beamformers have been identified as cost-effective energy-efficient solution towards deploying such systems. Most existing hybrid architectures rely on subconnected phase shifter network large number antennas. Such approaches, however, cannot fully exploit advantages arrays. On other hand,...

This paper introduces a linear slot antenna array based on an empty substrate integrated waveguide at 28 GHz. The proposed offers the advantages of reduced weight and fabrication cost as well facilitates relatively easier integration with planar electronic components compared to conventional slotted arrays. A high gain efficiency low losses are major considerations which can be achieved by design when array. geometry suggests operating bandwidth 10.4% (i.e. 26.5-29.4 GHz) suitable fulfil 5G...

A multiple-input-multiple-output (MIMO) antenna array for triple-band 5G metal-frame smartphone applications is proposed in this paper. Each single element consists of an S-shaped feeding strip and L-shaped radiation on the metal frame. The dimension only 6.5 mm × 7 (0.076 λ0 0.082 λ0, free-space wavelength at frequency 3.5 GHz). -6 dB impedance bandwidth eight-antenna can cover 3.3-3.8 GHz, 4.8-5 5.15-5.925 GHz. evolution design analysis optimal parameters a are derived to investigate...

Electrically small antennas for wireless communications applications are prone to excite common mode currents on cables connected them measuring their performance. A miniature RF-optical transducer enables an optical fibre connection the antenna, thereby eliminating large distortion associated with unwanted radiation from a coaxial cable. This opto-electric field sensor system operates 300 kHz 10 GHz. Results of UWB monopole antenna cable and compared.

This paper initially presents an overview of different miniaturization techniques used for size reduction printed log-periodic dipole array (PLPDA) antennas, and then continues by presenting a design conventional PLPDA that operates from 0.7–8 GHz achieves realized gain around 5.5 dBi in most its bandwidth. antenna is as baseline model to implement novel technique extend the low-frequency response. completed replacing longest straight with triangular-shaped optimizing four dipoles using...

This paper demonstrates a simulation-assisted measurement technique to determine the gain of an antenna accurately in open test site or anechoic chamber. The proposed is based on two-antenna method using Friis equation far-field free-space conditions, with actual setup modelled CST Studio Suite for simulation. An LTE-reject UHF TV log-periodic dipole used validate this paper. simulation order estimate appropriate minimum separation distance between two antennas that needs be for...

This letter presents a microstrip patch antenna array fed with low-loss and highly efficient feeding structure called empty substrate-integrated waveguide (ESIW). The proposed targets 5G wireless communication systems operating at 28 GHz. consists of 4 × radiating patches, where every four elements are grouped together forming 2 subarray each the subarrays is by ESIW network aperture coupling. experimental results demonstrate good agreement simulated results, offering wide |S <sub...

The coexistence of TV broadcasting and mobile services causes interference that leads to poor quality-of-service for consumers. Solutions usually found in the market involve external band-stop filters along with reception log-periodic Yagi-Uda antennas. This paper presents a antenna design without additional filtering serves as lower cost alternative avoid from into UHF TV. proposed operates band (470–790 MHz-passband) rejects 800 MHz 900 bands (stopband) 4G/LTE-800 GSM900 services,...