A Planar Antenna Array With Separated Feed Line for Higher Gain and Sidelobe Reduction

Ali, Mohd Tarmizi; Rahman, Tharek bin Abd; Kamarudin, Muhammad Ramlee; Tan, Mohd Nor Md; Sauleau, Ronan

doi:10.2528/pierc09041301

Cited by 19 publications

(11 citation statements)

References 6 publications

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“…The centers of the four patches are and the longitudinal axes of the transmission lines are located on a circular with the radius of 27 mm. Equal current distribution among the outer circles is achieved by maintaining the line width at 5 mm, producing a 50 Ω input impedance without the use of additional quarter wavelength transformers [25].…”

Section: Antenna Structurementioning

confidence: 99%

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

Jais¹,

Jamlos²,

Jusoh³

et al. 2013

PIER

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Abstract-A novel switchable beam textile antenna (SBTA) for wireless body area network (WBAN) applications is proposed. The SBTA is centrally-fed by a coaxial probe and the power distributed over four circular radiating elements. Four RF switches are integrated through which the SBTA is able to generate beam steering in four directions: 0 • , 90 • , 180 • , and 270 • , with a maximum directivity of 6.8 dBi at 0 • . Its small size (88 mm × 88 mm) and flexibility enables the structure to be easily integrated into safety jackets, rain coats, etc., for tracking, and search and rescue communication purposes. The structure successfully integrates reconfigurability into a wearable textile antenna.

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Section: Antenna Structurementioning

confidence: 99%

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

Jais¹,

Jamlos²,

Jusoh³

et al. 2013

PIER

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“…Unlike this design, in general, separated feed networks have been designed for probe feed array antennas [21]. The radiating element plotted in Fig.…”

Section: B High Gain Microstrip Patch Antenna Designmentioning

confidence: 99%

Design of a 1.26 GHz high gain microstrip patch antenna using double layer with airgap for satellite reconnaissance

Ozenc

Aydemir

Öncü

2013

2013 6th International Conference on Recent Advances in Space Technologies (RAST)

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In this paper, we introduce a method using double layer with airgap to design a high gain single element microstrip rectangular patch antenna operating at 1.26 GHz. Double layer technique provide us easy fabrication, besides, under layer consisted of double-sided copper ensure using one side as ground plane and other side as feed network for higher gain array antenna. Low cost fabrication also has been taken into account. To do that, we used a widely available FR4 material and instead of using low-loss and expensive substrates, we inserted an air gap between radiating and ground planes. This air gap reduces both the electric field concentration on the lossy epoxy and the effective dielectric constant of the radiating plane. Therefore, a low-loss and high-gain single element rectangular patch antenna is obtained. The simulation results conducted by CST Microwave Studio and measurement results carried out in an anechoic chamber of the proposed antenna are included in this study. The close similarity between simulation results and measurement results has been observed. This proposed antenna is appropriate to use in especially global position satellite systems, life detection radar systems and wireless communication systems.

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“…The radiation pattern in H-plane can be determined by substituting (10) and (11) into (12). Figure 12 shows that the layout of antenna elements is printed with parasitic elements.…”

Section: Improved the Rpaa With Parasitic Elementsmentioning

confidence: 99%

“…In [12], the structure of planar antenna array between without ("Structure 1") and with ("Structure 2") an air gap was compared. The simulated observation has been done in terms of the size of the antenna, sidelobe level, antenna gain and return loss.…”

Section: Comparison Of Planar Antenna Array With and Without Air Gap mentioning

confidence: 99%

A Novel of Reconfigurable Planar Antenna Array (Rpaa) With Beam Steering Control

Ali¹,

Tan²,

Rahman³

et al. 2010

PIER B

Self Cite

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Abstract-A new antenna structure is formed by combining the concept of reconfigurable planar antenna array (RPAA) with the parasitic elements to produce beam steering patterns. The antenna has been integrated with the PIN diode switches that enable the beam to be steered in the desired direction. This has been done by changing the switch state to either on or off mode. In this work, a number of parasitic elements have been applied to the antenna, namely reflectors and directors. They are placed in between the driven elements, which is aimed to improve the beam steering angle. With such configuration, the main beam radiated by the array can be tilted due to the effect of mutual coupling between the driven elements and parasitic elements (reflectors and director). The unique property of this antenna design is that instead of fabricating all together in the same plane, the antenna's feeding network is separated from the antenna radiating elements (the patches) by an air gap distance. This allows reducing the spurious effects from the feeding line. The optimization results for the resonant frequencies of the antennas with variable air gap heights are also been studied. The antenna is made for 5.8 GHz. Good agreement is achieved between the simulation and measurement.

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A Planar Antenna Array With Separated Feed Line for Higher Gain and Sidelobe Reduction

Cited by 19 publications

References 6 publications

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

Design of a 1.26 GHz high gain microstrip patch antenna using double layer with airgap for satellite reconnaissance

A Novel of Reconfigurable Planar Antenna Array (Rpaa) With Beam Steering Control

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