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A flexile, compact textile antenna that operates in the 2.4 GHz Zigbee band is proposed. The substrate and conductive plane are constructed by textile materials, which make it is easily to be integrated with clothes and also comfortable to be wear. Two types of conductive materials are used to form the radiation element and ground plane. The measured result shows that the impedance bandwidth of antenna...
In this paper, split ring resonator (SRR) loaded metamaterial (MTM) antenna with CPW and microstrip feed have been proposed. Two antenna structures are presented which have an antenna size of 50 mm × 40 mm × 2.56 mm. The proposed structure with CPW feed shows dual-band behavior with an impedance bandwidth of 9.1% (centered at 1.54 GHz) for first band and 9.8% (centered at 2.86 GHz) for second band...
The bandwidths of the wireless channels have been extended in IEEE 802.11ac compared to 802.11n and is restricted strictly to the 5 GHz ISM band. It also allows MIMO which makes antenna design challenging especially where the space is restricted. Here a wide band slot antenna in the shape of a modified square with dual ports is proposed. The antenna has two asymmetrical orthogonal micro-strip line...
A novel wideband compact antenna design at the edge of the ground plane is presented. The design, mainly composed of an edge-coupled capacitor as a tuning mechanism, can be used as building blocks for future multi-band antennas with reconfigurable operation in which the capacitor is replaced by a varactor. The antenna is first designed with an inductive feed. The corresponding equivalent circuit is...
In this paper, the design of rectangular dielectric resonator antenna with a slot feed for industrial, scientific and medical (ISM) radio bands applications is illustrated. The effect of slot feed on the dielectric resonator antenna (DRA) is observed. This paperwork can be useful for WLAN applications with the operating frequency band 2.4 – 2.5 GHz or 5.725 – 5.875 GHz.
In many HF/VHF communications applications, the antennas are mounted on vehicular platforms. As such, the combination of the antenna and the platform constitutes the main radiating structure. However, most HF/VHF antennas are generally not designed with the presence of the platform in mind. In this paper, we report the results of a preliminary study in which we investigate how the performance of a...
In this paper, a novel probe-exciting feed structure was proposed for improving the bandwidth of a waveguide broad wall slot array antenna. Both a conventional inclined slot feed and the proposed one are applied to the design of the broad wall slot arrays with the same specification, respectively, and then, their results are compared by using the full-wave EM simulation. As expected, the bandwidth...
An effective magnetic loop array antenna with modified feeding structure is designed, fabricated and tested. This antenna works at 4.83 GHz–5.04 GHz, and radiate omnidirectionally in the azimuth plane. Compared with the original effective magnetic loop array antenna, the bandwidth increases 3 times. The average gain is 5.65 dB, and the elevation angles at different frequencies are about 30 degrees...
In this paper, a compact differential-fed antenna with filtering responses is proposed. The antenna is composed of two radiating patches and a differential-fed circuit embedded with two u-shape slots which generate two notches. The stacked patch is employed to further improve the impedance bandwidth to fit the LTE communication application. The proposed antenna achieves the 18% impedance bandwidth...
The cross polar power resulting due to illumination of an offset reflector by a linearly polarized circular feed operating in TE11 mode can be suppressed considerably by employing TE21 and TM11 modes having proper mode coefficients and relative phases. This paper presents the design and performance evaluation of such a smooth walled circular tri-mode matched feed. Using an analytical pattern for the...
Aperture-coupled microstrip line feed circularly polarized patch antenna is designed and its performance characteristics are observed by changing its feed orientations. The perfect impedance matching and appreciable axial ratio bandwidths are achieved from the current model. The complete analysis is done by changing feed line orientations and by placing special slots on the ground element. The antenna...
In this paper, a Pentagon Micro strip patch antenna using a Hybrid Coupler for multiband operations is designed and analyzed. The work is done for L-Band application, by exciting two orthogonal 90-degrees time phase difference in hybrid coupling to obtain a circular polarization. The proposed antenna design is able to operate at 1–2 GHz frequency. The design simulation is done by Method of Momentum...
In this study, a compact wideband slot antenna with band notch performance is designed. An M-shaped slot on the feed line increases the impedance bandwidth of the square slot antenna. A stop-band notch can be achieved by using two L-shaped protruded strip inside the square-ring stub. The designed slot antenna has a compact size of 20×20 mm, showing wideband characteristics in the frequency band of...
This paper describes a novel approach for the design of a compact microstrip loop antenna for 5.8 GHz ISM band applications. This antenna has been designed in a Flame Retardant (FR4) substrate which is placed above the ground plane with air dielectric. The resonant frequency of the proposed antenna depends on the radiating loop. A gap-coupled capacitive feeding mechanism, for achieving higher bandwidth...
A novel feeding mechanism for a rectangular patch antenna is introduced. A phase shift caused by path inequality between two possible symmetrical feeding points is introduced, in order to achieve wideband operation at the 2.4 GHz WiFi band. The idea is to create two separate resonances, by exploiting a phase shift in one of the feeds. Simultaneously activating the two feeds yields to an envelope formed...
This paper presents modeling and simulation characterization of a co-planar proximity fed patch antenna that utilizes copper nanofilm (thickness: 1–100 nm) as a radiating element using IE3D simulation software. On a 1.6 mm height FR4 substrate, the proposed antenna resonates at 6.2 GHz and 9.8 GHz, with an impedance bandwidth of 10.53 GHz. The results are compared with 17 micron bulk copper patch...
In this paper a broadband Rectangular micro strip Antenna with parasitic patches on CPW feed is presented. Antenna composed of a planar rectangular patch element with two parasitic patches for broad banding. The overall size of the antenna is 62 mm X 47 mm X 1.6 mm including the finite ground CPW feeding mechanism and total volume of the antenna is 4.66 cm3. The antenna operates across frequency bands...
A broadband dual-polarized antenna operating at 2.4GHz for Wireless Local Area Network (WLAN) application is proposed. The proposed antenna is designed with two different polarizations, which are right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP). This broadband dual-polarized antenna is designed with method of inverted suspended rectangular microstrip patch antenna...
Improvement of bandwidth of an electrically small and low profile antenna is studied. The bandwidth of electrically small and low-profile antenna in improved using a non-foster element (NFE). This antenna consists of an air gap and two dielectric substrates. The NFE is installed to the meandered line of antenna. As a result, Bandwidth of after installing NFE is 73.5 times wider than the bandwidth...
Beam port and multiplexing radiation efficiencies of a multi-beam antenna employing a decoupling and matching feeding network was investigated. The multiplexing efficiency is useful to evaluate the band width characteristics of the multi-beam antenna for MIMO applications. Excitation coefficients of the multi-beam antenna was also studied to consider the relation to the bandwidth characteristics of...
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