SRR and S-shape slot loaded triple band notched UWB antenna

This paper demonstrates the design of a triple band notched ultrawideband circular microstrip patch antenna loaded with Complementary Split RingResonator (CSRR) and S-shaped slot in microstrip feed line. Complementary Split Ring Resonator slot and S-shaped slot are used to produce band notched characteristics for WiMAX band (3.30–3.60 GHz) and WLAN band (5.10–5.80 GHz) respectively. The downlink frequency band (7.25–7.75 GHz) of X-band for satellite communication is notched using Symmetrical Split Ring Resonator Pair (SSRRP) as electromagnetic coupling element near microstrip feed line which produces band stop characteristics. Measured results of fabricated antenna prototype are compared with simulated results and found in correspondence. The VSWR and vector current plots show evidence of the significant suppression in the desired frequency bands.     

基于互补分裂谐振环的十字缝隙贴片天线（英文）

A compact patch antenna is designed, which is with structures of cross-shape slot, Complementary Split Ring Resonator(CSRR), and loaded transmission line. To implement the compactness in size, these structures are etched on the ground plane, then the input impedance has been improved. The CSRR is employed to improve impedance matching between the source and radiation patch, and the cross-shape slot on the radiation patch is utilized to increase the bandwidth. The design is validated by compariso...     

Frequency notched wide slot antenna for UWB/2.4 GHz WLAN applications

A compact frequency notched microstrip slot antenna for ultra-wideband (UWB) /2.4 GHz-band wireless local area network (WLAN) applications is proposed. The antenna is similar to a conventional microstrip slot antenna; however, by introducing a cross wide slot and a meandered-slotted stub, both compact size and frequency notched function can be achieved. It has been studied both numerically and experi- mentally for its impedance bandwidth, surface current distribution, radiation patterns, and gain. As will be seen, an operation bandwidth of over 4.61 ranging from 2.39 to 11.25 GHz for return loss lower than having a frequency notched band ranging from 4.75 to 5.85 GHz has been achieved, and good radiation performance over the entire frequency range has also been achieved.     

A printed monopole ellipzoidal UWB antenna with four band rejection characteristics

An antenna design with four band rejection characteristics for UWB application is demonstrated. The proposed unique UWB antenna has shape of an embedded ellipse at top of trapezoidal patch (named as ellipzoidal), 50 Ω impedance microstrip line feed and a truncated beveled ground plane. To realize four band stop characteristics, three inverted U-shaped and a single I-shaped slots each of half guided wavelength are utilized on radiating element. The fabricated antenna has dimensions of 27 mm × 36 mm × 1.6 mm. This four band notched ellipzoidal UWB antenna has measured frequency bandwidth 2.8–14 GHz for magnitude of S₁₁ < −10 dB level. The measured ellipzoidal antenna exhibits four band rejection characteristics for magnitude of S₁₁ > −10 dB at 3.55 GHz for WiMAX band (3.26–3.9 GHz), 4.55 GHz for ARN band (4.35–5.05 GHz), 5.7 GHz for WLAN band (5.5–6.65 GHz) and 8.8 GHz for ITU-8 band (7.95–9.35 GHz). The proposed ellipzoidal UWB antenna maintains omnidirectional radiation pattern, gain, linear phase response, <1 ns group delay, and transfer function in the whole UWB operating bandwidth except at notched frequency bands.     

一种结构简单且陷波特性易调节的超宽带天线

设计了一种具有陷波特性的超宽带(UWB)天线,由一个圆环形贴片和部分地板组成,通过在贴片上 刻蚀一个弧形槽可以在不改变天线尺寸的基础上实现阻带特性。利用HFSS 仿真软件对该天线进行了仿真设计,设 计结果表明天线能够在2. 8-10. 8GHz 频带内实现宽带特性,并在5. 1-6GHz 处形成阻带。在此基础上,加工和测量 了天线模型,实测结果表明天线在工作频带内具有良好的辐射方向图和稳定的增益,而且天线尺寸小、结构简单。 非常适合应用于超宽带系统。     

Triple band notched mushroom and uniplanar EBG structures based UWB MIMO/Diversity antenna with enhanced wide band isolation

Triple band-rejection MIMO/Diversity UWB antenna characteristics are described in this paper. Proposed antenna discards worldwide interoperability for microwave access WiMAX band from 3.3 to 3.6 GHz, wireless local area network WLAN band from 5 to 6 GHz and X-Band satellite downlink communication band from 7.1 to 7.9 GHz. Mushroom Electromagnetic Band Gap (EBG) structures helps to attain band notches in WiMAX and WLAN bands. Uniplanar plus shaped EBG structure is used for notch in X-band downlink satellite communication band. Decoupling strips and slotted ground plane are employed to develop the isolation among two closely spaced UWB monopoles. The individual monopoles are 90° angularly separated with stepped structure which helps to reduce mutual coupling and also contributes towards impedance matching by increasing current path length. Mutual coupling magnitude of more than 15 dB is found over whole UWB frequency range. The Envelope Correlation Coefficient is less than 0.02 over whole UWB frequency range.The variations in the notched frequency with the variations in mushroom EBG structure parameters are investigated.The antenna has been designed using FR-4 substrate and overall dimensions is (64 × 45 × 1.6) mm³.     

基于地板开槽的陷波矩形渐变超宽带天线设计

提出了一种具有陷波特性的UWB天线.该天线用开槽的金属片作为辐射单元,并通过对地板的开槽处理减小了天线的尺寸.结合HFSS仿真工具,对天线结构进行理论优化并通过大量仿真对天线尺寸进行调整;设计出一种基于FR4介质的尺寸为25*15*1mm3的天线模型,并设计模型进行加工测量.该天线的工作频带覆盖3.1～10.6 GHz,并避免了3.5-GHz WiMAX,和5.825-GHz WLAN频段,适于超宽带无线通信系统的应用.     

具有带阻特性的宽缝隙超宽带天线研究

根据短距离无线电通信系统对超宽带天线的要求,设计制作了矩形宽缝隙超宽带（UWB）天线,并通过加载λ_g/4开路枝节的方法实现了超宽带天线的带阻特性,分析了天线参数对其辐射特性的影响。仿真及实验结果表明：该天线满足短距离无线电通信系统对UWB天线的要求,实现了4.5~6 GHz的带阻特性,具有稳定的增益,良好的波形保真特性。该天线尺寸小、成本低且易于集成,可以作为短距离无线通信系统的收发天线。     

Band notched UWB circular monopole antenna with inductance enhanced modified mushroom EBG structures

Circular monopole antenna for ultra-wide band applications with notch band transition from WLAN to WiMAX is presented. The proposed antenna rejects WiMAX band (3.3–3.8 GHz). Antennas utilises modified mushroom-type electromagnetic band gap (EBG) structures to achieve band-notched designs. The proposed inductance enhanced modified EBG structures are 34 % compact than the conventional mushroom EBG structures. The band notched antenna designs using EBG structures have advantages like notch-frequency tuning, antenna design independent approach and omnidirectional radiation pattern. The step wise effect of inductance enhancement and tuning of notch from WLAN band (5–6 GHz) to WiMAX band is shown. Effect of variation of EBG structure parameters on which notched frequency depends is investigated. The proposed antenna has been fabricated on low cost FR4 substrate with overall dimensions as (42 × 50 × 1.6) mm³. Measured results are in good agreement with simulated ones.     

A circular monopole antenna for bandwidth enhancement using cylinder slots with triple band notch characteristics

This article introduces a super wideband along with three notch bands circular patch monopole antenna. The design structure is applicable for microwave and high-speed wireless devices (2.19 to 25 GHz). In order to create a broad band, a ring dimension circular patch is used. To generate three notch bands, six symmetrical tiny cylinder stubs are introduced on the ground. These notch band frequencies can eliminate unwanted interference from various wireless frequencies, which mainly cover three notch bands: 5.5–7.3, 12.05–14.46, and 17.71–19.5 GHz. The steady radiation, super bandwidth, and stable gain properties expand when the ring patch and line feed are combined. It is excellent for many UWB applications because of its compact size (39 × 29 mm ²) and large bandwidth (166.97% fractional bandwidth). This model employs various size reduction and matching approaches to get a better response. The mechanisms of these structures are identified, and overall performance is compared with parametric analysis, tables, and figure.     

一种具有陷波特性的Vivaldi天线设计

提出了一种具有陷波特性的新型超宽带Vivaldi天线。采用双Y巴伦实现了微带-槽线过渡,利用多阶阻抗变换器解决了宽带阻抗匹配问题。通过在微带线上添加狭缝,实现了对WLAN应用频段(5.125~5.825 GHz)的隔离,使该天线具有陷波特性。在仿真设计的基础上制作了实验模型,并对其进行了测量。实测结果表明:在超宽带UWB(Ultra Wide-Band)应用频带(3.1~10.6 GHz)范围内,除隔离频带(5.1~6.0 GHz)以外,该天线的驻波比VSWR≤2,辐射方向图定向性较好,且交叉极化较低,从而证明了该天线设计的实用性。     

Compact fractal based UWB mimo antenna with dual band dispensation

Analog Integrated Circuits and Signal Processing - In this study, a fractal-based ultra-wideband multiple-input-multiple-output antenna with a compact structure is proposed. By using monopole...     

Compact printed ultra-wideband monopole antenna with dual band-notched characteristics

A compact printed ultra-wideband (UWB) monopole antenna with dual band-notched characteristics is presented. One complementary split-ring resonator (CSRR) is etched inside the patch of the monopole antenna to achieve dual notch frequency bands. A practical example for a UWB antenna (working from 2.90 to 12 GHz) is demonstrated, with one notch frequency band at 3.40-3.48 GHz and the other at 5.40-5.98 GHz. In addition, the effect of the dimensions of the CSRR on the dual notch frequency bands is also analysed.     

一种新型的具有带阻特性的超宽带微带天线

设计制作了一种新型的具有带阻特性的超宽带微带天线。天线采用50Ω共面波导馈电结构,辐射单元采用圆形金属贴片,在圆形贴片上开一个倒U形槽,实现了天线的带阻特性。测试结果表明:在频率段2.8-12.0 GHz内(除5.00-5.95 GHz外)天线驻波比小于2,且天线具有近似全向辐射的特性;而天线在频率段5.00-5.95 GHz内形成了阻带,从而有效阻隔了WLAN(5.150-5.825 GHz)频率段。该天线具有尺寸小,易于与微波电路集成等优点,可以用于超宽带系统。     

新型小尺寸三陷波超宽带天线的设计

设计了一种紧凑的具有三陷波特性的超宽带天线。天线采用渐变微带线馈电,并通过矩形加半圆的辐射单元和半圆形地板来实现超宽带。通过在辐射单元上刻蚀对称的L形槽和圆环形槽,来实现在WLAN/WiMAX的陷波特性;在渐变微带馈线两侧增加对称的C形谐振器来达到在X频段的陷波特性。实验结果表明,天线在2.68~13GHz频段内电压驻波比小于2,同时在3.1~3.8GHz,5~5.9GHz,7.25~7.85GHz频段内有陷波抑制作用,且具有良好的辐射特性。天线具有较小的几何尺寸,仅为20mm×30mm。     

一种具有三阻带和高频截止特性的超宽带天线

为了有效抑制超宽带(UWB)通信系统和窄带通信系统之间潜在的干扰,设计了一款具有三阻带特性和高频截止特性的超宽带天线。天线总尺寸为33 mm×19 mm×1 mm。该天线的辐射单元由一个椭圆形的单极子和一个倒梯形结构组成,由50的矩形微带线馈电,接地板由一个矩形和一个开槽梯形结构构成。对天线进行加工并测试。结果表明,该天线在3.3~3.6 GHz处的阻带由辐射单元上的凹形槽产生,5.15~5.35 GHz和5.725~5.825 GHz处的阻带由微带馈线两旁的U形寄生单元产生,10.8 GHz高频处的截止特性是由微带线两旁对称的凹形寄生单元共同决定的。天线的测试结果与仿真结果吻合良好。     

一种小型化双陷波可重构UWB天线设计

提出了一种小型化的双陷波可重构超宽带(ultra wide band,UWB)天线,通过在辐射贴片上刻蚀大、小两个C形槽,实现5G (3.3～4.4 GHz)/WiMAX (3.3～3.6 GHz)和WLAN (5.150～5.825 GHz)两个频段的陷波.采用两个PIN二极管跨接在C形槽上,通过控制PIN二极管的通...     

Dual band monopole antenna based on metamaterial structure with narrowband and UWB resonances with reconfigurable quality

In this article, an Ultra Wide Band (UWB) monopole antenna based on Metamaterial (MTM) unit cell with reconfigurable feature has been developed. The proposed antenna covers 3.1–10.6 GHz for UWB applications and it has a reconfigurable narrow-band for L-band (1.27 GHz) and wireless applications. The gaps in Split Rings Resonator (SRR) element are made for the Left-hand capacitance and Ω-shape strip layer by four via junctions are used for Left-hand inductance. The antenna is printed on FR-4 low cost substrate with relative permittivity of 4.4 and thickness of 1.6 mm. The total size of the antenna is 40 mm × 40 mm. The simulation is carried out using HFSS commercial full-wave software. In addition, the experimental results are presented and compared with simulated results. The antenna gives a maximum peak gain of 6 dBi with Omni-Directional radiation pattern and high efficiency of more than 70%. By embedding four switches in Ω-shape strip layer, a reconfigurable antenna has been successfully designed for wireless applications with sufficient qualification. The monopole part covers the UWB spectrum and the CRLH is responsible for the controllable narrowband resonance. The simulation and experimental results are confirmed by the numerical results.     

Compact differential bandpass filter with a narrow notched band using APCL structure suitable for UWB application

A compact differential band pass filter with asymmetric parallel-coupled lines (APCL) and center frequency of 5.6 GHz is proposed in this paper. The APCL suppresses unwanted RFID signals by introducing a fully tunable notched band at 6.8 GHz. By combining the concept of transmission matrix with modal analysis and extracting a novel model for symmetric three parallel coupled lines (SPCL), role of each resonant frequency is clearly explained. Measurement results in the differential mode show a pass band from 3.1 to 8.1 GHz and a wide stop band from 9.1 to 16 GHz with attenuation of more than 20 dB. In addition, S₂₁ in common mode is lower than −10.5 dB over the pass band.