This article describes a dual-polarized endfire antenna array for millimeter-wave (mm-wave) frequencies. The consists of chain-slot-shaped pattern on mobile phone metal frame. is fed using transmission line, which would cause only negligible capacitive loading the sub-6 GHz realized same frame and, therefore, not significantly degrade its performance. makes colocating and mm-wave antennas in same, shared volume possible. Measurements indicate that four-element placed within provides gain...

This article presents a dual-polarized millimeterwave endfire antenna array for mobile devices. The is integrated into metal-framed phone and radiates through 20 × 3.5 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> window in the metal frame. measurement results show realized gain above 6 dBi frequency band of 28-33 GHz three-element array. Beam-steering up to ±40° possible. physically offset from frame, thus minimizing capacitive...

In this paper, a dual-polarized frequency-reconfigurable mm-wave patch antenna array is described. The design incorporates varactor diodes symmetrically loaded onto the four corners of square patch. Parallel plate series capacitors are constructed to achieve required low total capacitance by moving an inner layer. Additionally, novel dual-function shorting vias implemented into structure, which serve as RF choke for providing dc-bias voltage varactors, and behave shunt inductive loadings...

Novel miniaturized transmitting (TX) and receiving (RX) wireless power transfer (WPT) resonators operating at 6.78 MHz integrated with an antenna for the Medical Implant Communication Service (MICS) band (402–405 MHz) are devised presented. Parametric analysis matching circuits of basket-weave shaped resonator topology discussed. WPT radiation efficiencies analyzed optimized using a finite element method numerical solver. The prototype model is fabricated tested in vitro, human-body phantom...

This article presents an extremely low-profile tunable antenna design for smartphones with height of only 0.75 mm. The proposed is integrated into the back cover device to utilize existing gap between battery and as efficiently possible. By utilizing both components adjustable feeding weights, designed multiport system covers 3300–4200 MHz frequency range 100 instantaneous bands. In addition just tuning, these elements can be utilized adapt different operation environments, such changes in...

The co-existence of millimeter-wave (mm-wave) and sub-6GHz antennas in a smartphone presents many performance-limiting aspects. When both are attached to the metal frame, feed lines mm-wave might short-circuit antennas, thus, may significantly affect their performance. This paper method design that function as transmission at frequencies but correspond open circuits sub-6GHz. study determines, theory, smallest achievable capacitive loading with different line types experimentally validates...

A small-size microwave sensor is developed for non-contact imaging of a human body structure in 2D, enabling fitness and health monitoring using mobile devices. method tissue experimentally validated. Subcutaneous fat reconstruction depth up to 70 mm maximum thickness measurement error below 2 are demonstrated by measurements with phantom subjects. Electrically small antennas integration the into device. Usability applications, healthcare, weight management demonstrated.

Metal frame presence in the modern mobile devices is been taken into consideration. Average uplink equivalent isotropic radiated power (EIRP) defined for full sphere beam scanning at cumulative distribution function (CDF)= 0.5 level, which dictates EIRP maximization mmWave antenna solutions. These challenges have addressed with a V-pol hybrid broadside-endfire array. Presented solution shows good potential possible implementation.

In this paper, we present a dual-polarized frequency-reconfigurable patch antenna working at millimeter wave frequency bands for 5G applications. A square is surrounded by four metallic L-shaped walls. Four ideal varactor diodes are placed between the corners of and Frequency tunability achieved adjusting capacitances diodes. Two 50-Ω probes used to feed which can excite two orthogonal polarizations. Operating vary from 23 GHz 45 with 10-dB return loss when capacitance decreases 0.05 pF...

A novel miniaturized transmitting (TX) and receiving (RX) wireless power transfer (WPT) resonators operating at 6.78 MHz integrated with antenna for medical implant communication service (MICS) band (402 MHz-405 MHz) are devised presented. Integration of into system optimization matching circuit discussed. The prototype model is fabricated tested in vitro, using human body phantom mimicking electrical properties the tissues. efficiency (PTE) 30% 20 mm distance implanted gain -23 dBi...

In this article, a dual-polarized (DP) endfire antenna array is proposed for the 5G smartphone applications. The covers all five defined millimeter-wave (mm-wave) frequency bands, namely n257, n258, n259, n260, and n261, which are used mobile communications. Electrical dipole to achieve horizontal polarization (HP), parasitic element included bandwidth enhancement. A shorted-patch functions as magnetic facilitating vertical (VP). Additionally, broadband operation realized by novel stacked...

Clinically many methodologies, both invasive and non-invasive, have been applied on the assessment of intestinal function in vivo. In routine, there are two preferable non-invasive methods, including ultrasound imaging stethoscope, to get insight motility for clinical diagnosis. However, operation traditional monitors is relied professionals' experience, also sensing probes needed attach patient's abdomen directly. The measurement procedure easy cause infection uncomfortable. To improve...

The smartphone, as a media device, should offer large-size screen and fast data rates in well-packed device. Emergent 5G technologies based on millimeter waves need efficiently radiating antennas integrated into devices whose bodies (especially glass screens) behave waveguides the antenna frequency bands. Using concept of retroreflective surfaces, this work proposes compact metasurface located below smartphone which reduces surface-wave excitation propagation, significantly improves...

Integration of small antennas is emphasized when more and should be placed to the limited volume handsets. This paper shows a mm-wave antenna array low-band LTE antenna, which are designed share same metal frame section in smartphone. The results show that two can integrated together without additional remarkable degradation their performance.

In this paper, we present an antenna cluster concept operating in millimeter-wave (mm-Wave) frequency bands for 5G applications. Unlike conventional arrays made up of identical elements, a array is constructed using non-identical dipoles with high coupling that are placed 2-mm wide slot. The cumulative distribution function (CDF) the spherical coverage gain used to evaluate beam-forming capability. High over band can be achieved by adjusting amplitudes and phases excitation vector. To...

Nonlinear biharmonic electromagnetic field scattering on a metal sphere covered by substance with nonlinear characteristics is considered. material equations given as Taylor series are used here.

Experimental investigation results of nonlinear loaded dipole and spherical reflector excitation with biharmonic electromagnetic field are considered. Findings compared an appropriate boundary problem computation results.

Additional antennas are needed in smart phones to support 5G bands. The metal rim, which is the most attractive position for antennas, already fully occupied by supporting legacy Therefore, there a growing interest new, more challenging antenna locations, such as back cover of phone. In this paper, we introduce dual-polarized frequency reconfigurable wideband planar multiport mobile has height only 0.5 mm. simulations show that introduced achieves better than −5.8 dB efficiency from 3.3 GHz 4.2 GHz.