Wideband and Efficient Slot Cavity Backing for Unidirectional Log-Periodic Antenna

Ha, Jong‐Myung; Filipović, Dejan S.

doi:10.1109/lawp.2017.2787695

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…In particular, using arch-shaped cells, it is possible to interleave two or more antennas to radiate with double linear polarization, or combine the two linear polarizations to obtain LHCP or RHCP polarization [ 43 , 44 ]. A wideband cavity backing unidirectional LP antenna is proposed in [ 45 ] to obtain enhanced efficiency in a wide frequency range, as well as a better impedance matching at the low-frequency band. Moreover, to simplify the feeding structure and reduce the antenna footprint, a printed LP monopole [ 46 ] and trapezoidal dipole [ 47 ] antenna array was proposed.…”

Section: Uwb Antennasmentioning

confidence: 99%

Sinuous Antenna for UWB Radar Applications

Mescia

Mevoli

Lamacchia³

et al. 2021

Sensors

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In this paper, the recent progress on sinuous antennas is detailed, focusing the attention on the antenna geometry, dielectric structure, and miniaturization techniques. In the first part, we introduce the basic principles of the frequency-independent antenna, in particular the self-complementary and log-periodic geometries, as well as the antenna geometries, all characterized in terms of angles. The operating principles, main advantages, system design considerations, limits, and challenges of conventional sinuous antennas are illustrated. Second, we describe some technical solutions aimed to ensure the optimal trade-off between antenna size and radiation behavior. To this aim, some special modification of the antenna geometry based on the meandering as well as on the loading with dielectric structures are presented. Moreover, the cavity backing technique is explained in detail as a method to achieve unidirectional radiation. Third, we present a new class of supershaped sinuous antenna based on a suitable merge of the 2D superformula and the sinuous curve. The effect of the free parameters change on the antenna arm geometry as well as the performance improvement in terms of directivity, beam stability, beam angle, gain, and radiating efficiency are highlighted.

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Section: Uwb Antennasmentioning

confidence: 99%

Sinuous Antenna for UWB Radar Applications

Mescia

Mevoli

Lamacchia³

et al. 2021

Sensors

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“…In the past few decades, various wideband antenna design approaches based on truncated frequency-independent antennas have been extensively developed; unfortunately, the elaborated smoothly tapered configuration may add certain complexities to the design and fabrication of wideband antennas. 4,5 Therefore, the urgent problem is to develop wideband antennas with simple configurations. Recently, the multimode resonance concept has been advanced as one of the most popular wideband antenna designed techniques by simultaneously exciting multiple resonant modes to broaden the available radiation bandwidth, relatively simple configuration can be yielded.…”

Section: Introductionmentioning

confidence: 99%

Triple‐resonant wideband 1.5‐wavelength sectorial dipole antenna

Pan

Jia

et al. 2021

Int J RF Mic Comp-Aid Eng

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A novel wideband, triple-resonant sectorial dipole antenna with simple configuration is advanced. The antenna is evolved from a 1.5-wavelength prototype electric dipole, which is backed by a circular metallic planar reflector. The flared angle of the sectorial radiator and the corresponding usable resonant modes for wideband radiation is determined by mode synthesis chart. As numerically and experimentally validated, the flared angles of the principal dipole should be 300 , with its radius approximately equal to 0.23-wavelength centered at 2.4 GHz. By introducing a pair of tuning stubs and a pair of slits along circumference, three resonant modes simultaneously excited in a single sectorial dipole to generate a wideband, tripleresonant radiation characteristic. Prototype antennas are then fabricated to experimentally validate the design approach. It is shown that the proposed antenna exhibits a unidirectional pattern with its impedance bandwidth over 73.3%. Meanwhile, stable radiation patterns with gain fluctuation less than 2.4 dB, low cross polarization level of À27 dB, and maximum gain of 6.9 dBi are realized within the same frequency range.

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