A dual-band antenna for off- and on-body communications in the 2.45- 5.8-GHz Industrial, Scientific, Medical bands is presented. The two radiation characteristics, i.e., patch-like off-body link monopole-like link, are achieved by utilizing inherently generated TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> xmlns:xlink="http://www.w3.org/1999/xlink">02</sub> modes of a circular patch antenna. shorting pin arc-shaped slots employed...

A new approach to realize robust, flexible, and electronically tunable wearable antennas is presented. Conductive fabric used form the conducting parts of antenna on a polydimethylsiloxane (PDMS) substrate. Then lumped (active passive) elements, required for electronic tuning RF choking, are fully encapsulated with additional layers PDMS. As concept demonstration, frequency-reconfigurable has been designed fabricated. The details prototype manufacturing process described. Two UWB human...

A novel compact dual-band cavity-backed substrate integrated waveguide (SIW) array antenna using high-order radiation modes has been proposed in this paper. The first hybrid mode (superposition of TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">310</sub> and xmlns:xlink="http://www.w3.org/1999/xlink">130</sub> ) the second (TM xmlns:xlink="http://www.w3.org/1999/xlink">320</sub> K-band SIW cavity are excited by an inductive window for...

An on-chip bandpass filter (BPF) is designed and fabricated in a 0.13-μm SiGe (Bi)-CMOS technology. This BPF consists of broadside-coupled meander-line resonator (BCMLR) conjunction with defected-ground structure (DGS). By simply grounding BCMLR, the can be converted into BPF. Further applying DGS to this BPF, an additional transmission zero generated high-frequency band. To understand fundamentals design, LC-equivalent circuit given for investigation zeros poles. The measured results show...

An on-chip resonator is designed and fabricated using a standard 0.13-μm SiGe technology for millimeter-wave applications. The based on unique structure, which consists of two broadside-coupled meander lines with opposite orientation. equivalent LC circuit the given, while impact structure resonance frequencies investigated. Using this along capacitors, compact bandpass filter (BPF) also fabricated. measured results show that can generate at 57 GHz attenuation better than 13.7 dB, BPF has...

A novel 360° beam steering patch antenna with parasitic elements is presented in this paper. The designed consists of a radiating and six elements, each which connected through group shorting vias controlled by p-i-n diode switches. By switching on the desired groups vias, electric field distribution inside substrate cavity appears at direction. Rotationally performance scanning realized. To further understand operating mechanism, modeled equivalent circuit terms off status sector antenna,...

This communication presents new designs of dual-circularly polarized (CP) planar aperture antenna and array for 60 GHz applications. First, a four-port with its feeding network is developed that exhibits wide impedance bandwidth, dual-CP radiation as well high gain. Then, based on the proposed antenna, scheme building proposed. With this combines power splitting series method, four sequentially fed elements are successfully combined to form CP array. The experimental results show -10 dB...

A new wideband sinusoidally-slotted graphene-based cross-polarization converter (CPC) is proposed in this paper.The polarization can realize a broadband terahertz conversion from 1.28 to 2.13-THz with ratio (PCR) of more than 0.85.Taking advantage the gradient width modulation unit structure, continuous plasmon resonances are excited at edges sinusoidal slot.Therefore, achieve simplified structure.Furthermore, characteristics CPC insensitive incident angle.The PCR remains 0.85 little...

We present our study on polydimethylsiloxane (PDMS)-embedded conductive fabric, which we propose as a simple yet effective solution to the challenging issue of poor PDMS-metal adhesion, allowing for relatively easy realization robust flexible antennas wearable applications. The method combines use fabric radiator with PDMS, acts substrate and protective encapsulation simultaneously. For first time, holistic mechanical electrical properties proposed combination materials is presented...

This paper introduces a unique approach for the implementation of miniaturized on-chip resonator and its application first-order bandpass filter (BPF) design. utilizes combination broadside-coupling technique split-ring structure. To fully understand principle behind it, simplified LC equivalent-circuit models are provided. By analyzing these models, guidelines an ultra-compact BPF given. further demonstrate feasibility using this in practice, both implemented fabricated standard 0.13-μm...

In this letter, an on-chip miniaturized bandpass filter (BPF) is presented, which based on a grounded center-tapped ring resonator (CTRR) with shunt capacitive loading. To analyze the principle of design, simple but effective equivalent circuit model provided. Using model, it easy to show that CTRR-based approach has potential generate two transmission poles within passband. Compared conventional single-pole-based approach, dual-pole design not only possesses flexibility controlling passband...

This paper presents a new dual-band dual circularly polarized (CP) high gain patch antenna array for vehicle satellite communications. The consists of 16 linearly elements backed with frequency-selective-surface (FSS)-integrated polarization rotation ground. ground is located underneath the array, which not only acts as reflector to increase boresight but also enables array's CP radiation. electromagnetic (EM) waves reflected by retard either 90° or 270° respect EM directly radiated upper...

In this brief, a class of microstrip bandpass filters (BPFs) with quasi-reflectionless behavior on both input and output ports is presented. A single-port reflectionless BPF proposed by shunt connecting one bandstop filter cell namely one-cell. This one-cell made up high impedance transmission line as series band-pass section shunt-connected band-stop resistively terminated. the operation passband, used to transmit spectral energy, while regarded an open circuit. Besides, out-of-band energy...

Fresnel zone plate (FZP) lens antenna, consisting of a set alternative transparent and opaque concentric rings arranged on curvilinear or flat surfaces, have been widely used in various fields for sensing communications. Nevertheless, the state-of-art FZP antennas are limited to single band due frequency-dependent feature, which hinders their use multi-band applications. In this work, shared aperture dual-band metalens antenna is proposed by merging two single-band operating at distinct...

This article presents a dual-wideband dual-polarized aperture-shared antenna array with low blockage effect between cross-band elements, including low-band (LB) element <inline-formula> <tex-math notation="LaTeX">$4 \times 4$ </tex-math></inline-formula> high-band (HB) underneath. The radiator of the proposed LB consists four slim loops loaded periodic split-ring resonators (SRRs) for achieving scattering property in high band. As result, on HB is nearly indistinct. radiation performance, as...

This article presents an aperture-shared dual-band large frequency-ratio high gain antenna for sub-6 GHz and millimeter-wave (mm-wave) bands applications. Initially, the partially reflective surface (PRS) of Fabry–Pérot cavity (FPC) operating at band is realized by using single-layered periodic grid patches while opaque region mm-wave bandwaveband Fresnel zone plate (FZP) lens implemented double-screen dipoles. Then, PRS FZP are hybridized together upgraded into a kind composite metasurface,...

This letter presents a dual-band antenna with large frequency ratio of 11.7 (2.4 GHz/28 GHz) by integrating an mm-wave Fabry–Perot cavity (FPC) into sub-6 GHz patch antenna. The periodic slots functions as both the 2.4 radiator and partially reflective surface (PRS) 28 FPC By properly tuning length slot, PRS's reflection can be easily adjusted. As slot's width operating at are much smaller than wavelength GHz, slot have little impact on radiation patch. Furthermore, because resonance, peak...

Abstract This article proposes 3D printed broadband transmissive metasurfaces for spin‐decoupled wavefront shaping based on a versatile cross‐polarization rotation meta‐atom. A meta‐atom combining cross‐linear polarization dynamic phase and Pancharatnam–Berry (P–B) is demonstrated to realize beam shaping. The built in an antenna‐circuit‐antenna fashion. Stacked patch antennas are used here as both the receiving transmitting because they can achieve wide bandwidth good impedance matching free...

This communication demonstrates an endfire aperture-shared antenna for millimeter-wave (mm-wave) multibeam and sub-6-GHz applications. High-gains are achieved based on the parabolic reflectors (PRs) that can collimate electromagnetic (EM) wave radiated from feeds at focal points. In contrast to full metal-based PR in band, mm-wave is implemented using periodic metal gratings, which shows a bandgap band while allowing EM free pass. this way, antennas share same radiating aperture with near...

A unique miniaturization technique for on-chip passive device implemented in gallium arsenide (GaAs)-based technology is presented, which based on edge-coupled cells (ECCs). The principle of an ECC first studied by means the equivalent LC circuits. Then, using as a baseline, combination different shorting-ground and tapping methods fully investigated terms their impact frequency responses. By directly shorting specific fingers to ground, can be converted into resonator without increasing any...

Load-variation insensitivity, for impedance matching between power amplifiers (PAs) and transmitting antennas, contributes to challenging the design of millimeter-wave wireless systems. In this paper, a W-band two-way balanced PA based on compact quadrature coupler with broadside coupled stripline (BCSL) as core is presented enhance load-variation insensitivity stability. The proposed truly broadband low amplitude phase imbalance. achieves higher power-added efficiency (PAE) unsaturated...

A novel design of boresight and conical pattern reconfigurable antenna with the capability 360° polarization scanning is presented in this paper. At mode, produces a continuously over azimuth plane, which provides adaptive-polarization reception between transmitter receiver. The analyzed terms electric field an explanation generation TM11 TM02 resonant modes, innovative method designing antennas for WLAN applications. proposed validated by good agreement simulation experimental results...