Triple Band-notched Ultra-wideband Research Articles

Switchable triple band-notched UWB antenna modelling for interference rejection from dual WiMAX bands and satellite C-band service

A triple band-notched monopole antenna with reconfigurable characteristics is designed and investigated in this study for implementation in ultra-wideband (UWB) systems. A conventional rectangular monopole antenna is intended first to accomplish UWB performance characteristics. Further, to obtain triple notched characteristics, three U-shaped slots are etched on the rectangular radiating surface of the antenna. A wide frequency bandwidth ranging from 2.13 GHz to 10.50 GHz with three notched bands operating at 2.65 GHz (2.49–2.82 GHz), 3.43 GHz (3.18–3.68 GHz), and 4.08 GHz (3.93–4.22 GHz) have been successfully realized. By integrating three PIN diode switches, total eight reconfigurable states of operations have been realized in the UWB spectrum. A thorough analytical investigation along with the comparison of simulated and measured performances for the proposed antenna has been presented to manifest the applicability in practical systems. The antenna structure can be successfully implemented for rejecting interferences from dual WiMAX bands along with C-band fixed satellite communication systems, respectively.

A Triple Band-Notched UWB Antenna Using Folded Resonators

Abstract A triple band-notched ultra-wideband (UWB) monopole antenna etching novel folded resonator on the radiating patch, ground and between the feeding-line, is presented in this paper. The tri-rejection bands are 5.1–6.1 GHz, 7.6–8.8 GHz and 10.1–10.8 GHz which have covered bands of WLAN and ITU 8 GHz. To analyze the principle of proposed antenna, the simulation of parametric study and distribution of surface current are carried out. The size of antenna is 32 mm×19 mm×1 mm. And the test results are in good agreement with the simulation, which indicate that the antenna is promising for UWB system.

Planar UWB Monopole Antenna with Tri-Band Rejection Characteristics at 3.5/5.5/8 GHz

A triple band-notched ultrawide band (UWB) antenna is presented to avoid the interference of services working in the UWB band, such as WLAN, WiMAX and X-band satellite systems. The arc H-shaped slot on the radiating patch creates a low frequency notched band, while the other two band-notched bands are formed by cutting narrow slots on the ground plane. The presented antenna can operate on the ultrawide band efficiently and inhibit interference from three different kinds of narrow band communication systems. The simulation and measurement results show that the antenna has excellent band-notched function on the rejectband and almost omnidirectional radiation pattern on the passband.

Compact Size Triple Notched-bands UWB Antenna with Sharp Band-Rejection Characteristics at WiMAX and WLAN Bands

In this paper, a compact triple band-notched Ultra Wideband (UWB) antenna with sharp band-elimination features and controlled notched bandwidths is proposed and discussed. The design is made up of a rectangular-shaped patch UWB planar monopole antenna with double collections of band-notched configurations. The band-notched configurations are involved to produce the desired lower and upper stop bands with good frequency selectivity and suitable stop bandwidths. The first notch is realized by using a C-shaped slot etched in the radiating patch in order to eliminate the interference at the WiMAX (3.4 - 3.8 GHz) applications. The second and the third notches are realized together by using a pair of U-shaped resonators that are located beside the feed line in both sides to eliminate the interference with the lower WLAN (5.15–5.35 GHz) and the higher WLAN (5.725–5.825GHz) bands. Additionally, the bandwidths of the lower and upper stop bands can be control separately by changing the parameters of the band-notched configurations. Furthermore, the suggested triple notched bands UWB antenna is optimized, fabricated, and measured for verification purposes. The measured results are close to the simulated ones.

Design and analysis of triple band-notched micro-strip UWB antenna

Abstract In this paper, a compact ultra-wideband (UWB) antenna with triple notch bands is proposed. By etching out two ESRR of different dimensions in the radiating patch, two band-notched properties in the Wi-MAX (3–3.7 GHz), WLAN (5.125–5.825 GHz) are obtained. Furthermore, by placing SIR near the feed line–patch junction of the antenna, band notch property for the 7.9–8.4 GHz (X-band) frequencies is achieved. Design guidelines for implementing the notch-bands at the desired frequency regions are provided. The notched frequencies can be adjusted according to specification by altering the parameters of the ESRR and SIR. The effects of the key design parameters on band notch characteristics are also investigated. The realized antenna achieved an operating bandwidth (VSWR < 2) ranges from 2.94 to more than 11.3 GHz with triple notched bands of 3.0–3.7, 5.2–6.1, and 7.9–8.7 GHz. The proposed antenna is well designed and extensively investigated. The experimental results are given to verify that the proposed antenna with a wide bandwidth, three designated band-notched function which is suitable for modern high data rate UWB communication applications. The maximum simulated gain of the antenna is around 10.02 dBi with an average efficiency above 82.2% throughout the bandwidth.

Triple band-notched UWB antenna using novel asymmetrical resonators

In this paper, a new Ultra-wideband (UWB) antenna with triple band-notched characteristics is presented. The antenna is composed of a semicircular radiator ended with trapezoidal structure, a rectangular ground plane, and occupies a compact structure of size 30×30mm2. By employing a parasitic strip in the backside of the radiator, etching a pair of inverted-L slots on the ground plane and introducing novel asymmetrical resonators alongside the feed line, three rejected bands are obtained. The proposed antenna provides an extremely wideband width ranging from 3.0GHz to 12GHz (|S11|<−10dB), except the tri-rejection bands of 3.39–3.88GHz, 5.11–5.97GHz, and 8.0–8.71GHz. Furthermore, the antenna achieves a square shape in the second notched band. In addition, cross polarization, radiation patterns and moderate gains are also investigated. Good agreement is obtained between the measurement and simulation, indicating the antenna is promising for UWB applications.

Design of a Triple Band-notched UWB Planar Monopole Antenna

In this paper, a novel design of a compact planar ultra wide band (UWB) monopole antenna with triple band notched characteristics has been presented. The antenna has a unique shape and has been fed through a 50 Ω microstrip feedline. The strength of the antenna lies in three band notched properties for WiMax system at 3.3 - 3.7 GHz, WLAN IEEE 802.11a at 5.15 - 5.85 GHz and X band satellite communication at 7.25 - 8.395 GHz. The notched bands have been achieved by incorporating an inverted U-slot etched on the radiator patch, an inverted C-slot also on the radiator patch and a U-slot on the microstrip feed line. In order to achieve FCC defined impedance bandwidth of 7.5 GHz, a rectangular cut in the ground plane has been introduced along with staircase structure in the bottom edge of the radiator. The proposed antenna is having a compact size of 30 X 30 X 1.6 mm3 and exhibits a large bandwidth from 2.8 GHz to 10.7 GHz. The antenna has been successfully simulated and fabricated. The radiation pattern is omni-directional in H-plane and the E-plane exhibits dipole like radiation pattern. The gain of the antenna is stable across the whole operating frequency band except at three notched bands.

Triple band notch UWB printed monopole antenna with enhanced bandwidth

In this paper, a compact triple band-notched ultra-wideband (UWB) printed monopole antenna is proposed with enhanced bandwidth. It exhibits a stable omnidirectional radiation pattern and a dipole-like pattern in the H-plane and E-plane, respectively, for the entire UWB. The antenna consists of a rectangular patch with two bevels. To realize notch characteristics in WiMax (3.3–3.7GHz) and WLAN (5.15–5.85GHz) band, two round shaped slots of half wavelength are inserted in radiating patch. The rectangular ground plane has two bevels in upper edge to enhance bandwidth which cover the frequency range from 3 to 15GHz. The two bevels also help in getting impedance matching especially beyond 10.6GHz. A pair of C-shaped slots is etched in ground plane to get a third notch in X-band satellite communication band (7.1–7.76GHz). The effects of each individual slot on band notch characteristics are also investigated. The proposed antenna exhibits stable gain throughout the UWB and it also has a very good capability to suppress gain at notched band. Moreover, the designed antenna has a compact size of 31mm×22mm.

A Compact Triple Band-Notched UWB Antenna Using Sinusoidal EBG

In this paper, a compact (17.7 mm 12 mm) triple band-notched UWB antenna is presented. For inserting desirable notches, three concentric ring resonators have been placed on the back side of antenna in a manner that the first resonance frequency of each resonator coincides with one of the desired notches. Considering that the second resonance frequency of outer ring resonator places in UWB frequency band, an EBG using sinusoidal variation of the characteristic impedance of outer resonator is used to reject the spurious notch. CST simulation results verify good performance of the antenna and show acceptable frequency and time domain characteristics such as wide frequency band width (3 GHz - 10.3 GHz) with good return loss( greater than 17 dB in most parts of band), fairly deep notches, approximately omnidirectional patterns and low group delay variations. Keywords: Band-notched UWB antenna, electromagnetic band gap (EBG), group delay variation, ultra wide band (UWB).

A Compact Microstrip-Fed Triple Band-Notched UWB Monopole Antenna

In this letter, a novel low-profile microstrip-fed compact triple band-notched ultrawideband (UWB) antenna is proposed. Notch bands around the 3.3-3.8-GHz WiMAX and 5.15-5.85-GHz WLAN frequencies are obtained by etching out two elliptic single complementary split-ring resonators (ESCSRRs) of different dimensions from the radiating patch of the antenna. Furthermore, by placing two rectangular split-ring resonators near the feedline-patch junction of the antenna, rejection for the 7.9-8.4-GHz X-band frequencies is achieved. Design guidelines for implementing the notch-bands at the desired frequency regions are provided. The match between the simulated and experimental results suggests that the proposed antenna can be a good candidate for application in UWB communication systems.

Triple band-notched UWB monopole antenna with two resonator structures

We propose a novel configuration of a triple band-notched ultra-wideband (UWB) antenna. The designed structure is based on an elliptical monopole antenna combined with a complementary split ring resonator (CSRR) structure and a spiral resonator. The spiral resonator can achieve the dual-band notched performance at WiMAX band and ITU 8 GHz by adjusting the length and width of a spiral line. Besides, the CSRR can obtain the notched band at WLAN 5 GHz by changing the radius of a ring slot. The designed antenna shows that a VSWR of less than 2 was satisfied with a resonant frequency in the range of 1.34–11.4 GHz with a 78.96%, except for triple notched bands. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:4–6, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27275

Very Compact Printed Triple Band-Notched UWB Antenna With Quarter-Wavelength Slots

A very compact coplanar waveguide (CPW)-fed ultrawideband (UWB) printed monopole antenna (PMA) with triple band-notched characteristics is presented. The antenna uses three open-ended quarter-wavelength slots to create triple band-notched characteristics in 3.3-3.7 GHz for WiMAX, 5.15-5.825 GHz for WLAN, and 7.25-7.75 GHz for downlink of X-band satellite communication systems, respectively. The open-ended quarter-wavelength slot is analyzed in detail. Surface current distributions are used to show the effect of these slots. The antenna shows broad bandwidth and good omnidirectional radiation patterns in the passband, with a very compact size of 19 × 24 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .

Ultrawideband Antenna With Triple Band-Notched Characteristics Using Closed-Loop Ring Resonators

The design of a simple multilayered triple band-notched ultrawideband (UWB) antenna is presented in this letter. The proposed antenna is compact in size, suitable for ultrawideband applications, and exhibits triple narrow frequency band notches to suppress the interference of the nearby wireless communication systems within a UWB frequency range. The narrow band notches are realized by adding closed-loop ring resonators designed to cover the 3.3-3.7-GHz, 5.15-5.35-GHz, and 5.725-5.825-GHz bands. The center frequencies of the band notches can be adjusted by varying the ring resonators' mean diameters. The designed antenna has a compact volume of 33 × 30 × 1.524 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . The antenna is fabricated and tested providing broadband impedance matching, appropriate gain, and stable radiation pattern.