- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) - Waterloo, ON (2018.8.19-2018.8.22)] 2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) - 3-D Printed Flexible Heterogeneous Substrates with Customizable Gain and Bandwidth
摘要： This paper presents a 3-D printed flexible heterogeneous substrate for wearable antennas with customizable bandwidth and gain. These performance parameters are modified by varying the ratio of percentage area of Acrylonitrile Butadiene Styrene (ABS) to NinjaFlex. Five flexible 3-D printed microstrip patch antenna (MPA) prototypes are designed, realized and measured each with different percentage area ratios, where the MPA’s RF performance is characterized with curvature. The five substrate designs are based on a combination of rigid ABS tiles of triangular shape surrounded with flexible NinjaFlex. All five designs show minimal antenna sensitivity to curvature, with a minimum resonant frequency shift of less than 1.2%. Results closely agree with simulations. Increasing the ABS area increases the MPA’s gain, but reduces the bandwidth and increases substrate rigidity. This results in a highly customizable and cost-effective substrate that allows the antenna designer flexibility in the choice of design parameters.
关键词： conformal antenna,3-D printing,wearable antenna,flexible,patch antenna,ABS,flexible electronics,NinjaFlex
更新于2025-09-23 15:23:52
-
[IEEE 2019 IEEE Asia-Pacific Microwave Conference (APMC) - Singapore, Singapore (2019.12.10-2019.12.13)] 2019 IEEE Asia-Pacific Microwave Conference (APMC) - Conformal Leaky-Wave Antenna Based on Partially Filled Rectangular Waveguide
摘要： The present paper is devoted to the development of a conformal leaky-wave antenna based on a curved rectangular waveguide. The process of obtaining the required beam position is about longitudinal tailoring the phase velocity. This is achieved with choosing the thickness of dielectric, which partially fills the slotted waveguide. The difference between wavelengths in curved and straight waveguides is taken into account. An amplitude distribution function is realized by means of traditional adjusting the each particular slot parameters. The results of computer simulation validate the proposed design technique.
关键词： rectangular waveguide,dielectric filling,phase velocity,conformal antenna,leaky-wave antenna,beam forming
更新于2025-09-23 15:21:01
-
[IEEE 2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON) - Lviv, Ukraine (2019.7.2-2019.7.6)] 2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON) - Calculation of Spectral Greena??s Function and Its Asymptotical Behavior for Sheet Electric Current in Two-Layer Dielectric Waveguide
摘要： Structures with patches placed on the interfaces in a two-layered dielectric waveguide are promising to be used in different applications at THz waves. To realize the method of moments (MoM) solution in the spectral domain spectral Green’s functions (GFs) for sheet electric currents on the interfaces of the two-layer dielectric cylindrical waveguide are needed. This paper presents the way to enhance the MoM solution efficiency by extracting an asymptotic behavior of the spectral GF which depends on two variables: the propagation constant and the azimuth index. Here asymptotic spectral GFs are constructed and calculated when electrical sheet current is placed on different interfaces.
关键词： two-layered cylindrical dielectric waveguide,spectral Green’s function,cylindrically conformal antenna
更新于2025-09-23 15:21:01
-
A low-profile 28-GHz Rotman lens-fed array beamformer for 5G conformal subsystems
摘要： This paper reports on the first demonstration of an experimental millimeter-wave (mm-wave) beamforming based on the conformal Rotman lens. The passive switched-beam network is intended for operation in the 28-GHz band, covering the 18-38 GHz range, for the deployment in the fifth generation (5G) subsystems. The primary objective of this work is to conduct the feasibility of designing a beamforming network (BFN) based on the liquid-crystal polymer substrate, and to evaluate the performances in terms of the scattering (S)-parameters and surface currents for the proposed flexural case of the convex-circumferential bending. A prototype has been accurately fabricated, and a setup has also been deployed to conduct the measurements. The performance in terms of the linear progressive phase behavior, as the main figure of merit, has been shown. The BFN exhibits significant characteristics to be used as a low-profile unit of the transceivers with the in-built beam steering for the conformal 5G subsystems.
关键词： beamforming network,Rotman lens,5G,mm-wave,wireless subsystem,conformal antenna array
更新于2025-09-09 09:28:46
-
[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Active Cancellation of Bistatic Scattering of Large Aircraft Using Conformal 4-Port Magnetic Antenna
摘要： Possibilities of the active cancellation of bistatic radar cross section (RCS) of the large aircraft (LA) with help of stealth conformal 4-port magnetic antenna (MA) is considered. The antenna is located in the upper part of the fuselage of an aircraft in a niche under the radar absorbing radome. The antenna is simulated in the form of loop, three-layer ferrite core with four single-turn coils and with excitation ports (in the modes of radiation and scattering). The effect of excitation of the ports on radiation patterns and the cancellation of bistatic RCS of LA?MA system in the range of 10 to 30 MHz is studied. It is shown that the smart inclusion of two or four ports of the active MA in the stealth-mode provides of the deep reduction (more 40 dB relative to aircraft RCS without antenna) of bistatic total RCS in the given angular sectors of observation.
关键词： active cancellation,conformal antenna,ferrite core,large aircraft,radar cross section,magnetic antenna
更新于2025-09-04 15:30:14