Graphene Based Circular Shaped Micro Strip Patch Antenna Array for 2.45 GHz ISM Band Application

Wireless Personal Communications - Graphene based circular microstrip patch antenna array is presented in this paper. First a single circular patch to resonate at 2.45 GHz is designed in...     

一种新型2．4GHz频带RFID抗金属标签天线

设计了一款能应用于金属货物识别的新型标签天线--准八木标签天线.基于折合振子和错位阵列技术,并使用高介电常数的介质基材,使天线的厚度限制在0.024λ,从而满足标签天线尺寸的要求.经实测验证,新型天线贴附在金属物体表面时,能达到5dBi的增益.     

Design of Metamaterial Antenna for 2.4 GHz WiFi Applications

Wireless Personal Communications - In this paper, Antenna is an evergreen field of research because of its never-ending demand in the modern communication era. In this paper metamaterial antenna is...     

一种小型折叠圆形贴片天线

对中心加有接地柱的圆形贴片天线进行了改进，提出了一种新型折叠贴片天线，不仅很大程度上减小了天线的尺寸，而且方向图的仰角也得到了一定程度的降低。     

Compact Patch Antenna Array for 60 GHz Millimeter-Wave Broadband Applications

Wireless Personal Communications - In this study, a wide-band compact patch antenna array is developed for 60 GHz band applications. The antenna array consists of eight identical elements....     

一种2.4GHz小型化微带天线

设计了一种新型小型宽频带微带天线。通过在贴片和地板上”开槽”形成特殊形状的方法,达到小型化和宽频带的目的。仿真结果表明,在中心频率2．4GHz时,相对带宽为15％,与原始的理论值相比较,小型化后的天线尺寸缩小了33％。     

Compact Bioinspired Antenna for WLAN 5 GHz Application

Wireless Personal Communications - This paper presents the development of a compact monopole antenna bioinspired in the Opuntia ficus-indica plant-shape, generated by Gielis formula, built in...     

一种星载SAR的新型双极化微带贴片天线

提出了一种适用于星载SAR的新型双极化微带贴片天线。在孔径耦合馈电基础上,采用同轴线到微带线垂直过渡的方式,设计了一种新型双极化天线单元,在保持孔径耦合贴片天线固有优点的同时,使得交叉极化、隔离度得到很好改善,同时节约了阵中空间。该天线适合作为星载SAR阵列天线单元。     

基于CC2430芯片的2.4GHz微带天线设计

针对无线模块中直立式天线体积大、功耗高问题,提出用微带天线替代传统直立式天线的方法,并讨论了微带天线的工作原理。介绍了中心频率为2.4 GHz微带天线的设计流程。根据需求确定微带天线的材料、形状、类型,用公式和软件计算出天线的尺寸等参数,再在Agilent公司的微波电路仿真软件ADS中建立天线模型并对其仿真,通过优化匹...     

一种2.4GHz天线在WAPI中的应用

介绍了一种工作频率在2.4 GHz应用于无线局域网鉴别和保密基础结构(Wireless LAN Authentication and Privacy Infrastructure,WAPI)标准的天线,天线采用现在广泛应用于ISM频段的平面倒F天线(Plane Inversion-FAncenna,PIFA)形式。阐述了PIFA的演变过程及其理论基础。根据传统的PIFA设计了一款应用折叠技术的PIFA,达到天线小型化的目的。制作出产品后天线尺寸只有8.85 mm×36.5 mm。该天线外形紧凑,成本低廉,能完全覆盖2.4~2.483 GHz ISM频段。     

用于2.4GHz射频识别的硅基集成小环天线的仿真与设计

以应用于2.4GHz频段的射频识别标签为背景,对硅基集成小环天线的阻抗特性和辐射特性进行了理论计算和仿真,并以仿真结果为依据,设计了一个用于2.4GHz频段射频识别标签的硅基集成天线。文中同时给出了天线设计时的一些调节和优化方法。测试结果表明,利用1.8mm×1.8mm的硅基集成天线,在等效发射功率为25dBm时,通过整流电路可以输出1.2V电压、15μA负载电流。     

一种新型圆极化贴片天线的研究

研究了圆极化微带贴片天线,通过在普通圆形贴片上开槽,提出了一种结构新颖的圆极化微带贴片天线.仿真以及实测结果表明,该天线具有较宽的3dB波瓣宽度(±50°)和良好的圆极化轴比性能,并且新型微带贴片天线的尺寸要远小于普通的圆形或圆环形贴片天线的尺寸.     

一种新型光子晶体结构的微带天线

提出了一种新型的基于二维光子晶体基底的微带天线,光子晶体结构是人造的周期性电介质结构,本文采用的方法是在电介质中引入周期性分布的空气孔洞,孔洞的分布是三角形点阵,然后在中心孔洞引入缺陷,但只是在中心孔洞的下半部分引入缺陷,即中心孔洞的深度为周围孔洞深度的一半,天线的贴片放在孔洞的底部,即将天线贴片放在了光子晶体内部。我们采用HFSS仿真软件对该结构进行了模拟,数值仿真结果表明该结构对天线的方向性有明显改善。     

一种用于RFID系统的双频微带天线的设计

针对射频识别系统UHF频段的中国标准840～845 MHz和920～925 MHz,提出一种基于E形天线和共面倒F形天线相结合的设计方案,设计了一款新颖的双频微带天线.通过调整短路针的位置.E形槽的宽度和相对位置实现请振.仿真和调试表明,该天线谐振在850 MHz和920 MHZ下,带宽(VSWR<2)可以覆盖以上两个频段.该天线兼备E彤天线的多谐振特性和倒F型天线的低后瓣特性.此外,天线结构简单、成本低廉,便于调谐.     

一种适用于2.4GHz无线语音的IFA天线设计

设计了一种用于2.4GHz无线语音的IFA( Inverted -F Antenna)天线,该天线能够满足2.4GHz频段无线语音传输对天线尺寸、价格和性能的要求.使用有限元法进行数值仿真和设计,该天线可达到较好的效果.该天线的仿真和实测结果表明,在2.46 GHz的中心工作频率下,回波损耗为19.9 dB,带宽约为5...     

Propagation Loss Measurement of Wireless Body Area Network at 2.4 GHz and 3.35 GHz Bands

The main purpose of this work is to measure and analyze the propagation loss of the Wireless Body Area Network (WBAN) in frequency and time domain at two frequency bands, namely 2.4 GHz band with 80 MHz bandwidth and 3.35 GHz band with 500 MHz bandwidth. Four different scenarios (front to front, front to back, front to off-body node and back to off-body node) using many antenna´s locations on the body are used to investigate the channel response (path loss) of WBAN. It is found that the front to front channels and the front to off-body node channels have a low fading. The front to back channels and the back to off-body node channels have a high fading that can be approximated by the Distorted Rayleigh fading. Thus the WBAN range for the front to off-body node scenario is more than the range of the back to off-body node scenario.

     

A Miniature Dielectric Loaded Monopole Antenna for 2.4/5 GHz WLAN Applications

A miniature dielectric loaded monopole antenna fed by coplanar waveguide (CPW) is proposed for WLAN applications in the 2.4/5-GHz bands. The dielectric material is a cylindrical block of ceramic with a 22 permittivity. The back side of the ceramic material with a simplified open-end tuning stub is also proposed. The prototype has been designed and fabricated and found to have bandwidths of 8% and 35.3% at the resonant frequencies of 2.48 and 5.60GHz, respectively, and the radiation patterns measured at resonance frequencies are very close to omnidirectional in the H-plane. The characteristics of the proposed antenna has been investigated using simulation software HFSS and experimental results. The measured and simulated results show excellent agreement     

High Gain Triple Band Microstrip Patch Antenna for WLAN,Bluetooth and 5.8 GHz/ISM Band Applications

Wireless Personal Communications - A high gain triple bands microstrip patch antenna with modified radiating patch is proposed. Two slits and a T-shaped slot are loaded at the optimum positions on...     

A Novel Two Port High Isolation Dual-Polarized Multiband Sub-6 GHz MIMO Antenna for IoT Connected Devices

Wireless Personal Communications - A novel multiband 2?×?2 dual-polarization antenna with couple of meander line structure is proposed for IoT connected devices. The MIMO antenna...     

一种新型2.4 GHz SiGe BiCMOS低噪声放大器

基于窄带低噪声放大器理论,设计了一种2.4 GHz,具有低功耗、低噪声和良好匹配性等优点的新型BiFET结构SiGe BiCMOS低噪声放大器。采用TSMC 0.35μm SiGe BiCMOS工艺库,利用SpectreRF软件的仿真结果显示,该电路具有2.27 dB低噪声系数,11.5 dB正向增益;2 V工作电压下,其功耗仅为6.1 mW。研究结果表明,该低噪声放大器在射频蓝牙系统中具有一定的应用前景。