An antenna design concept with detachable radiation elements offering modular geometry reconfigurabilities for wearable applications is presented. By utilizing snap-on buttons, both as the radio-frequency (RF) connection and mechanical holding mechanism, different modularly interchangeable microstrip patches are employed to demonstrate in terms of polarization resonance frequency. The uniqueness arises from fact that all configurations share one common feed structure which consists a...

A robust solution to realize reconfigurable textile antennas for wearable applications is proposed. The main idea integrate active components (such as varactors or p-i-n diodes) and their biasing circuit into a compact arrangement of back-to-back commercial snap-on buttons. resulting module can provide versatile reconfigurabilities antennas, with secure protection the rigid electronics while maintaining stable repeatable electrical connection flexible metalized textiles. To demonstrate...

A reconfigurable wearable textile antenna with wide frequency tuning range is demonstrated in this work. Frequency agility realized by adding a coplanar reconfiguration module to planar inverted-F (PIFA) constructed technology. The consists of small flexible printed circuit board (PCB) which integrates circuitry commercial snap-on buttons as electronic-to-textile connectors. Using equipped varactor diode, the reconfigurability PIFA investigated and optimized parametrically for maximum range,...

A wearable textile multiband antenna with full ground plane for wireless body area network (WBAN) applications is presented in this article. The bandwidth enhancement techniques of slots and multiresonant radiators capacitive coupling are used to achieve operation including an UWB standard. Antenna optimization performed using characteristics mode analysis (CMA) improve the high- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">...

A concept to realize multifunctional reconfigurable antennas for wearable applications is proposed. The general structure simply consists of a textile circular patch with three varactor-loaded modules evenly distributed around its edge. Based on the proposed concept, frequency- and pattern-reconfigurable antenna polarization-reconfigurable are demonstrated. first design able switch between broadside omnidirectional radiation modes frequency fractional tuning ranges 57.3% 27.2%, respectively....

We demonstrate a concept of compact and highly efficient circular traveling wave series-fed microstrip patch array working at 10 GHz. The elements are excited by line through coplanar proximity coupling. A dual-port feeding allows us to select the direction waves and, consequently, sense polarization patches. Simultaneous both ports with proper amplitude phase difference can result in radiated arbitrary polarization. Owing arrangement strong coupling, antenna exhibits structure achieves high...

A compact, highly efficient and flexible ultra-wideband antenna operating from 3 to 20 GHz is proposed in this letter. The completely made polymer comprising a patterned conductive (PEDOT) thin film attached transparent sticky tape substrate. overall dimension less than quarter-wavelength at the lowest frequency of operation device reaches radiation efficiency over 85% averaged throughout band. performs well under various bending conditions as demonstrated by measurements. realized offers...

This letter proposes a wearable dual-band dual-mode button antenna for wireless body-area network applications. It covers the 2.45 and 5.8 GHz Industrial, Scientific, Medical bands. The two operating modes of are designed to share common radiator with different functionalities distinctive communication requirements. operates from 2.32 2.57 as top-loaded monopole linear polarization, which is applicable on-body communications due its omnidirectional radiation pattern. In contrast, it works...

This letter presents a three-dimensionally (3-D)printed low-profile endfire dielectric antenna with wideband performance. The proposed device comprises four sections that are designed tapered permittivities and sizes to achieve impedance-matched surface-wave launching over wide bandwidth. effective permittivity of blocks is precisely controlled within the range 2.0 8.3 through varying infill factor 3-D printing process. relation between has been experimentally validated compared against...

A dual-band frequency-reconfigurable flexible textile and foam antenna with independent tunability is presented in this letter. The proposed operates simultaneously a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\text{TM}_{0(0.5)0}^{z}$</tex-math></inline-formula> mode higher order individual frequency centered at the 2.45 5.8 GHz industrial, scientific, medical bands. relative tuning range lower band...

A pair of commercial snap-on buttons is demonstrated as a detachable radio frequency (RF) balanced connection between garment-integrated textile dipole antenna and passive sensor-enabled identification (RFID) tag in wearable wireless system. This arrangement offers reliable, low-cost, easily RF coupling feeding connections for antennas, conceptualized simulations validated through measurements. In addition, back-to-back transmission-line structure has been designed measured to characterize...

An integration and modularization solution for a passive computational radio frequency identification (RFID) module is proposed wireless patient monitoring. In the integrated configuration, all electronic components are encapsulated within cavity of textile antenna. This forms compact protected embodiment suitable concealment in hospital garment, with aim being unobtrusive to older patients. addition, sensor antenna introduced through convenient snap-on attachment method RFID module. harmony...

A concept of frequency-reconfigurable circularly polarized (CP) antenna with omnidirectional radiation characteristics is introduced. The based on a center-fed circular patch shorting vias, surrounded by three arc-shaped arms. Omnidirectional CP attained through its two orthogonal radiators quadrature phase difference. Three varactor-loaded meandered slots are etched onto the top to miniaturize and empower it reconfigurability. resonance frequency vertically horizontally modes can be...

Laser-induced breakdown spectroscopy (LIBS) can benefit from sustaining laser generated plasma with microwaves to enhance elemental detection sensitivity.

In this paper, a 360° beam-steerable frequencyreconfigurable antenna with horizontal polarization is proposed. The based on an Alford loop and parasitic circular array of tunable electric-LC (ELC) resonators. It able to operate in either omnidirectional or directional mode allowing beamsteering the azimuth plane angular resolution 18°. frequency-tunable range from 2.0 2.4 GHz (18.2% relative bandwidth). By introducing 3-D printed dielectric lens radome two plates radial Vivaldi-shaped slots,...

This article presents a 3-D-printed dielectric rod antenna with wideband circular polarization. The proposed device comprises two main components: launching part and radiating part. consists of three cylindrical sections stepped permittivity for impedance matching to the rectangular waveguide feed. is tapered helical grooves that generate experimental results verify exhibits wide bandwidth 60.3% from 4.05 7.55 GHz, 3 dB axial ratio 57.0% 4.20 high realized gain varying within 8.3 11.5 dBiC...

This paper demonstrates a dual-band circularly polarized (CP) two-dimensional (2D) series-fed patch array antenna. The CP rotating sense in each band is opposite to other, which makes them well-suited for the downlink and uplink satellite applications. antenna can be designed achieve very high gain with simple feeding structure using spiral microsip line, integrated on single-layered substrate. A theoretical framework this type of antennas has been developed, facilitates an efficient fast...

A flexible dual-band dual-mode wearable antenna with a hybrid dielectric substrate is proposed for off- and on-body communications. It operates at two industrial, scientific, medical (ISM) bands, namely, broadside radiation 2.45 GHz an omnidirectional pattern 5.8 GHz. based on polydimethylsiloxane (PDMS) PF4-foam materials introduced to overcome the low efficiency in both modes due PDMS substrate. The realized by replacing areas exhibiting high power loss density low-loss material. This...

This paper studies the impact of different infill patterns on 3D printed dielectric resonator antennas (DRAs). Different with same percentage setting can have very actual material percentages, which result in a variation effective relative permittivity. consequently affects impedance matching and resonance frequency antennas. Furthermore, orientation DRA needs to be taken into account, due anisotropic structure within material. Based experimental results, rectilinear grid are generally...

A highly conductive graphene film made of binder-free and surfactant-free inks for a high performing UWB antenna based on non-metallic conductors operating in the microwave region.

Abstract Traditional microwave design and fabrication techniques have been adopted into the terahertz domain. Understanding properties of dielectric materials at frequencies is critical for accurate component design. Nevertheless, common are largely unknown. Hence, this paper presents relative permittivity, loss tangent, refractive index, extinction coefficient such materials, including substrates low-temperature co-fired ceramics (LTCCs), within 0.1 to 3.5 THz range. Terahertz time-domain...