Wideband Printed Dipole Antenna Research Articles

Study on the Conductivity Effect on the Characteristics of a Wideband Printed Dipole Antenna Implemented with Silver Nanoparticle Ink

This study examined a flexible composite wideband dipole antenna implemented with conductive silver nanoparticle ink having different conductivities. Two identical split ring resonators (SRRs) were designed to encompass each arm of a dipole element, and each dipole arm and its coupled SRR were printed on the top and bottom sides of a dielectric substrate. The overall dimensions of the compact antenna were 10 mm × 74.8 mm × 0.254 mm (0.053λo × 0.399λo × 0.0014λo at 1.6 GHz). The characteristics of the antenna with different conductivities were numerically investigated and experimentally confirmed. Our investigation aimed to ascertain the proposed antenna's response to different conductivity values and to determine the range of conductivity values that generates major changes in the antenna's performance characteristics in terms of impedance bandwidth, gain, and radiation efficiency. At conductivity values less than approximately 6.0 × 104 S/m, the number of generated resonances changed from three to two, and the antenna experienced a nearly 3-dB gain reduction when the conductivity approached 5.8 × 104 S/m.

A Novel Co-planar Waveguide-fed Direct Current Wide Band Printed Dipole Antenna

A Novel Co-planar Waveguide-fed Direct Current Wide Band Printed Dipole Antenna

Compact Printed Dipole Antenna for L- Band Radar Applications

This paper presents the design and analysis of a compact microstirp fed wide band printed dipole antenna operating in L band. The dipole antenna bandwidth is improved by flaring of dipole arms, tapering ground plane, and the best impedance matching is achieved by introducing an open circuited stub with dipole arm. Parametric study is carried out to study the effect of dipole length and arm width on the antenna resonant frequency and bandwidth has also been investigated. The antenna is printed on FR4 substrate and the simulated return loss bandwidth is validated by the measured result. The fabricated antenna provides a wide bandwidth of 51.2% at the centre frequency of 1.3 GHz and the peak gain of 3.2 dB which is suitable for phased array radar applications.

CPW-Fed Wideband Printed Dipole Antenna for Digital TV Applications

A co-planar waveguide (CPW)-fed wideband printed dipole antenna is developed to fulfill digital TV applications. This antenna is designed with multiple loops to effectively extend the frequency range of operations. Additionally, the parameters associated with the proposed antenna structure are well investigated and adequately determined. Experimental results demonstrate that the proposed CPW-fed dipole antenna can operate at a frequency band from 430 MHz to 1180 MHz in which the return loss is better than 10 dB. The measured radiation patterns look like a dipole-type pattern. Particularly, the proposed antenna has a gain ranging from 1.78 to 2.83 dBi. Therefore, the antenna proposed herein is very suitable to various digital TV applications for high-performance receiving.

Wideband printed dipole antenna using a novel PBG structure

AbstractA wideband printed dipole antenna with an integrated balun feed is given. To further get larger bandwidth capabilities of this antenna, a novel low‐cost smaller unit‐cell planar photonic bandgap (PBG) structure is etched onto the antenna surface, and a better dipole antenna is fabricated. Through optimizing the sizes of PBG structure, a 56.7% bandwidth is obtained where voltage standing wave ratio (VSWR) is less than 1.5 while a 36% bandwidth is obtained from initial structure. Agreement between calculations and measurements is very good. The result indicates that the novel design may obtain better wideband characteristic. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1862–1865, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24466

Design and analysis of wideband double‐sided printed spiral‐dipole antenna with capacitive coupling

AbstractA compact and wideband printed dipole antenna is presented for C‐ and X‐applications. The proposed balun‐fed antenna consists of a double‐sided printed dipole structure with a microstrip‐fed modified spiral‐dipole printed on the top side of the substrate, and a capacitive‐coupling rectangular‐patch, a connecting strip line and the ground plane printed on the bottom side. For the proposed antenna, a wide resonant band which extends from 6.27 to 12.47 GHz, with a fractional bandwidth of 66%, is observed. Details of the experimental and simulation results are presented and discussed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1312–1317, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23341

Dual wideband printed dipole antenna with integrated balun

A printed dipole antenna with integrated balun is presented. The radiating structure is a two-element dipole with resonances at 900 and 1700 MHz, with the balun providing one extra resonance at each band. By co-designing the radiating element with a Marchand balun modified for dual-band operation, an antenna covering the cellular bands 824–960 and 1710–2170 MHz has been achieved. Measurements on a fabricated antenna on low-cost FR-4 substrate show antenna efficiencies of >80 and >70% in the lower and upper band respectively. Despite the use of a dual-element radiator, the radiation pattern that is close to omni-directional H-plane is obtained.

Wideband Printed Dipole Antenna for Multiple Wireless Services

A printed dipole antenna with two U-shape dipole arms for multiple wireless services is presented. Prototype of the proposed antenna has been constructed and tested. The impedance characteristic is studied as a function of antenna dimensions. The proposed dipole antennas are shown to yield impedance bandwidth ratios of >90% for VSWR=2:1, which simultaneously supports multiple wireless services, such as PCS (Personal Communication Service), IMT-2000 (International Mobile Telecommunication-2000), and 2.4 G WLAN band.

Wideband printed dipole antenna parasitically enhanced with over-an-octave bandwidth. Dual-band variant for WLAN applications

In this paper, a wideband dipole antenna with more than an octave of impedance bandwidth is presented. Enhancement is achieved by using an additional coplanar parasitic element and via optimization of the tapered feeding network. The prototype antenna demonstrates 87% impedance bandwidth (VSWR < 2), operating between 2.01 and 5.08 GHz. A sensitivity analysis reveals the possibility for a dual-band variant, covering both the 2.4- and 5.2-GHz WLAN operating bands, for use in IEEE 802.11a/b/g compliant systems. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 444–449, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21375

A wideband printed dipole antenna with optimized tapered feeding balun for ISM and FWA bands

AbstractThis paper presents a wideband printed dipole‐antenna element. The broad bandwidth is achieved by optimization of the feeding network, which is implemented as a microstrip tapered balun. The design is based on double‐sided flat‐dipole implementation. The prototype antenna exhibits a measured impedance bandwidth of 58% (VSWR &lt; 2), operating over the entire 2.4‐GHz ISM and 3.6‐GHz FWA bands. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 437–441, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20495

Novel Wide Band Printed Dipole Antenna

Design, development and experimental observations of a L-band printed dipole antenna is presented. Bandwidth enhancement is achieved by end-loading of the dipole arms. Using the present technique impedance bandwidth can be enhanced up to 50% without degrading the efficiency of the antenna.