Improving the performance properties of a dipole element closely spaced to a PEC ground plane

Best,

doi:10.1109/lawp.2004.840722

Cited by 61 publications

(19 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, impedance matching the antenna to a 50 Ohm system will become increasingly more difficult as the distance of the dipole from the reflecting surface is reduced. (b) The energy stored in the near field of the dipole will be large, producing an antenna with a high (defined as the ratio of energy stored to energy accepted by the antenna [21]) and, correspondingly, with a very narrow impedance bandwidth. The last point is ultimately the main bottleneck of using a dipole over a PEC plane for most practical applications.…”

Section: Analysis Of Different Low Profile Antenna Design Approachesmentioning

confidence: 99%

“…A folded dipole could be used over the PEC plane in place of the regular dipole, as suggested in [21], to increase the input resistance of the antenna and achieve a better impedance matching. The reflection coefficient and input impedance for a folded dipole with length of located above a PEC plane are compared with the corresponding quantities for the regular dipole over PEC and PMC planes in Fig.…”

Section: Analysis Of Different Low Profile Antenna Design Approachesmentioning

confidence: 99%

See 1 more Smart Citation

Low Profile Fully Planar Folded Dipole Antenna on a High Impedance Surface

Vallecchi

Luis

Capolino

et al. 2012

IEEE Trans. Antennas Propagat.

146

View full text Add to dashboard Cite

Low profile fully planar folded dipole antenna on a high impedance surface Abstract-A fully planar antenna design incorporating a high impedance surface (HIS) is presented. The HIS is composed by a periodic array of subwavelength dogbone-shaped conductors printed on top of a thin dielectric substrate and backed by a metallic ground plane. First, the characteristics of a dipole over PEC or PMC layers, a dielectric slab, and the HIS are compared and studied in detail, highlighting the advantages provided by the use of the HIS. Then, the design of a low profile folded dipole antenna working at 5.5 GHz on top of the HIS is described. The surface provides close to 6% antenna impedance bandwidth and increased gain up to 7 dBi, while shielding the lower half space from radiation. The antenna structure comprises three metal layers without any vias between them, and its overall thickness is . The dipole is fed by a balanced twin lead line through a balun transformer integrated in the same antenna layer. A prototype has been built and measurements confirming simulation results are provided.Index Terms-AMC ground plane, artificial magnetic conductor, artificial magnetism, artificial substrate, impedance surface, low profile antenna, metamaterials, reflection phase.

show abstract

Section: Analysis Of Different Low Profile Antenna Design Approachesmentioning

confidence: 99%

Section: Analysis Of Different Low Profile Antenna Design Approachesmentioning

confidence: 99%

Low Profile Fully Planar Folded Dipole Antenna on a High Impedance Surface

Vallecchi

Luis

Capolino

et al. 2012

IEEE Trans. Antennas Propagat.

146

View full text Add to dashboard Cite

show abstract

“…The first method is to modify the dipole itself to increase the radiation resistance for better impedance matching. As an example, a multiple arm-folded dipole antenna above a ground plane with a height of 0.02λ 0 achieves a voltage standing wave ratio (VSWR) < 3, a bandwidth of 2.2%, an efficiency of 97%, and a broadside gain of 8.7 dBi [1]. The second method is to place the dipole above an artificial surface [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Bandwidth-Enhanced Low-Profile Antenna with Parasitic Patches

Kedze

2017

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

This paper presents low-profile broadband antennas, which are composed of four parasitic patches placed between planar radiators and a perfect electric conductor ground plane. Two types of planar radiators, a conventional dipole and a crossed dipole, are employed to produce linearly polarized (LP) and circularly polarized (CP) radiations, respectively. The radiator and parasitic patches are realized on thin substrates to lower the cost. Owing to the presence of parasitic patches, the antenna performance improves in terms of profile reduction, resonant frequency decrease, and bandwidth enhancement. These improvements are discussed and confirmed computationally and experimentally. The LP design with the overall dimensions of 120 mm × 120 mm × 16.3 mm (0.64λ 0 × 0.64λ 0 × 0.087λ 0 at 1.6 GHz) has a |S 11 | < −10 dB bandwidth of 1.465-1.740 GHz (17.2%), a broadside gain of 8.5-8.8 dBi, and a radiation efficiency > 96%. The CP design, which has the same physical size as the LP case, has a |S 11 | < −10 dB bandwidth of 1.388-1.754 GHz (23.3%), a 3 dB AR (axial ratio) bandwidth of 1.450-1.685 GHz (15.0%), a right-hand CP broadside gain of 7.8-8.7 dBic, and a radiation efficiency > 90%.

show abstract

“…Compactness and robustness against electrical influence from a vehicle (car) body [1,2,3,4] are also important for in-vehicle antennas because the wavelength is approximately 40 cm. In order to ensure flexibility for setting up the antenna, we examine the antenna that can be installed either in the cabin or in the vicinity of the vehicle body.…”

Section: Introductionmentioning

confidence: 99%

A compact Yagi-Uda antenna with a transmission line loaded for an ITS in-vehicle terminal in the UHF band

Iigusa

Sato

et al. 2012

IEICE ComEX

View full text Add to dashboard Cite

Abstract:We propose a three-element Yagi-Uda antenna with an inter-element spacing of 0.025 wavelengths for intelligent transport systems (ITS) in the ultra-high frequency (UHF) band. The Yagi-Uda antenna has a reflector dipole with a transmission line at the center. We show by numerical simulation that the antenna can be placed at the contact limit of a vehicle body with improved performance when the transmission line has a meandering configuration. Further, we show by experiment that the actual gain improves by approximately 2 dB when the antenna is placed near a conducting plate.

show abstract

Improving the performance properties of a dipole element closely spaced to a PEC ground plane

Cited by 61 publications

References 2 publications

Low Profile Fully Planar Folded Dipole Antenna on a High Impedance Surface

Low Profile Fully Planar Folded Dipole Antenna on a High Impedance Surface

Bandwidth-Enhanced Low-Profile Antenna with Parasitic Patches

A compact Yagi-Uda antenna with a transmission line loaded for an ITS in-vehicle terminal in the UHF band

Contact Info

Product

Resources

About