A broadband plate antenna with slits

Noguchi, Keisuke; Mizusawa, M.; Matsutani, H.; Betsudan, Shin-ichi

doi:10.1109/aps.1999.789297

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…This forms in an E-shaped radiating surface. Since the reduction in size usually is accompanied by reducing the bandwidth, two more rectangular slits are added on the surface to overcome this problem [7]. To our knowledge, such a compact design Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Ultra Miniturized E-Shaped Dual Band PIFA on Cheap Foam and FR4 Substrates Hala Elsadek and Dalia Nashaat

Elsadek¹,

Nashaat²

2006

Journal of Electromagnetic Waves and Applications

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A novel design of ultra compact Planar Inverted FAntenna (PIFA) is proposed for dual band resonant frequencies. The antenna is designed and fabricated on both foam and FR4 cheap substrates with dielectric constants ε r = 1.07 and 4.7, respectively. Over 95% reduction in the antenna size is achieved from conventional λ 0 /4 rectangular PIFA resonating at same frequencies. This is done by implementing two oppositely shorting capacitive straps under the radiating surface.Dual band operation is achieved by inserting two parallel slots on the edges of the PIFA radiating surface forming an E-shape. In this case, the center wing resonates at the higher frequency while the two side wings resonate at the lower frequency. The antenna resonance frequencies on FR4 substrate are 1.07 GHz and 2.77 GHz with area's reduction ratios of 97% and 81% for lower and upper resonance frequencies, respectively. The antenna size on FR4 substrate is 13 × 11 × 8 mm 3 . The antenna directivity is 3.73 with radiation efficiency 97%. The radiation pattern has acceptable shape with low cross polarization in both resonances and at both E-plane and H-plane directions.

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Section: Introductionmentioning

confidence: 99%

Ultra Miniturized E-Shaped Dual Band PIFA on Cheap Foam and FR4 Substrates Hala Elsadek and Dalia Nashaat

Elsadek¹,

Nashaat²

2006

Journal of Electromagnetic Waves and Applications

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“…palm handhelds, pocket PCs, laptop computers and PDAs) [1]. Numerous low-profile antennas have been developed over the last decades [2][3][4][5][6][7][8][9][10][11][12][13]. However, the demand for broadband antennas is becoming strong as nowadays wireless handhelds are required to possess a function of multimode/multiband operations.…”

Section: Introductionmentioning

confidence: 99%

“…Of our, a simple way to improve the bandwidth is to load the antenna with resistors [8,9], but this technique obviously lowers radiation efficiency. In [10,11], the bandwidth of a planar antenna is increased to 12% by introducing slits in the plates. The bandwidth of some low-profile antennas can be increased to more than 40% (e.g.…”

Section: Introductionmentioning

confidence: 99%

Broadband low-profile antennas for wireless applications

Pan

Papapolymerou

et al. 2007

IET Microw. Antennas Propag.

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Two novel broadband low-profile antennas are developed for the mobile terminals of wireless applications. The first one is a quasiplanar antenna which has a height of 0.06l 0 , where l 0 is the free-space wavelength at the centre frequency. The second one is a planar antenna which has a height of 0.056l 0. It is demonstrated that the quasiplanar antenna can achieve a bandwidth for VSWR , 2 of more than 45%, while the planar antenna realises a bandwidth of more than 40%. More importantly, over these bandwidths the broadband low-profile antennas have a quite constant omnidirectional radiation pattern with a peak gain of around 1 dBi. The antennas are designed on a commonly used RT/Duroid substrate; hence it is easy to integrate with RF front-end circuits. The antenna structures are described and the simulation and experimental results are presented.

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“…These constructions are possible to use two current modes that are unbalance and halance ones. The unbalance mode contributes to the radiation, while the balance one affects to the matching[l][2] [3]. The current modes also can be used in other model whose element 1 is grounded and element 2 is fed.…”

Section: Analytical Modelmentioning

confidence: 99%

“…As a challenge to the problem such as low radiation resistance and narrow bandwidth. we have suggested a broadbanding method by using balance mode to small antennas[l][2] [3]. The method was used for meander-line, helical and small plate antennas vertical to the ground plane, however, the method has not been applied to an antenna close to the plane of the box.…”

Section: Introductionmentioning

confidence: 99%