A 60 GHz conical horn antenna excited with quasi-Yagi antenna

Sironen, M.; Qian, Yongxi; Itoh, T.

doi:10.1109/mwsym.2001.966952

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…On the other hand, novel feeding methods have been reported for metallic horn antennas. These include a long conical horn fed by a Yagi antenna and a compact, surface-mounted, λ/4-horn fed by a microstrip patch [7][8][9][10]. However, the Yagi-fed long horn is not a UWB radiator, because of a limited bandwidth of the Yagi feed and the microstrip patch is also not a UWB feeding element, because of its relatively narrow impedance bandwidth.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Quasi-Planar Antenna With Enhanced Gain

Ranga¹,

Verma²,

Hay³

2014

PIER C

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A new ultra-wideband antenna with enhanced and nearly constant gain is presented. This quasi-planar antenna is composed of a CPW-fed printed monopole and a short horn, both made out of a single substrate. The measurements demonstrate an almost flat peak gain of 5.5 dBi ± 0.7 dB from 2.5 GHz to 15 GHz with the average gain difference in XZ plane is roughly 2 dB up to 8 GHz, which further rise to 6 dB at 10 GHz. The antenna also has a nearly linear phase response in this band. Well tested performance both in frequency and time domains, along with broad azimuth pattern, results in minimal ringing of a radiated pulse. The new antenna is suitable for establishing good line of sight link for UWB transmission and other broadband applications.

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Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Quasi-Planar Antenna With Enhanced Gain

Ranga¹,

Verma²,

Hay³

2014

PIER C

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“…This original design has been extensively reported by the authors [2,3] and widely applied throughout the literature. As illustrative examples, this antenna has been successfully used as a microstrip-towaveguide transition [4], in arrays [5,6], and designed at several frequency bands [7,8]. In spite of its solid implantation, the specific design process has not been detailed throughout, so making difficult it to improve or to migrate the design to other bands or substrates.…”

Section: Introductionmentioning

confidence: 99%

A low‐cost compact uniplanar Quasi–Yagi printed antenna

Ávila-Navarro

Segarra-Martínez

Carrasco

et al. 2008

Micro & Optical Tech Letters

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which are improvements of 12.8 and 11 dB, respectively, over the conventional DPA. Figure 10 shows the measured drain efficiency versus ACLR characteristics of various conditions for a 1-carrier WCDMA signal. The power tracking DPA at an ACLR of Ϫ45 dBc can produce a Pout of 43.4 dBm with the drain efficiency of 31%, which is the efficiency assuming that the efficiency of drain bias supply circuit is 100%. CONCLUSIONSWe have proposed the three-way DPA with the adaptive bias supply using the power tracking method for improving linearity of the DPA while preserving high efficiency. To achieve good linearity of the DPA without extra linearization techniques, the drain bias voltage of the carrier amplifier and the gate and drain bias voltages of the peaking amplifiers are controlled adaptively according to input power levels. To verify this method, a three-way DPA was implemented using 30-W Si LDMOSFETs and tested using two-tone and 1-carrier WCDMA signals at 2.14 GHz. We have observed the significant IM3 cancellation for a two-tone test with 1-MHz tone spacing. We have also achieved superior ACLR performance for a 1-carrier WCDMA signal over a wide operating power range. At an ACLR of Ϫ45 dBc, the power tracking DPA can produce a Pout of 43.4 dBm with a drain efficiency of 31%. The measured results confirm that the linearity of the DPA is improved with the adaptive bias control of the gate and drain bias voltages of the DPA without extra linearization techniques, while obtaining high efficiency. A robust modeling and design approach for dynamically loaded and digitally linearized Doherty amplifiers, IEEE Trans Microwave Theory Tech 53 (2005), 2875-2883. 4. K.J. Cho, J.H. Kim, and S.P. Stapleton, A highly efficient Doherty feedforward linear power amplifier for W-CDMA base-Stations applications, IEEE Trans Microwave Theory Tech 53 (2005), 292-300. 5. Y. Yang, J. Yi, Y.Y. Woo, and B. Kim, A fully N-way Doherty amplifier with optimized linearity, IEEE Trans Microwave Theory Tech 51 (2003), 986 -993. 6. J. Kim, J. Cha, I. Kim, and B. Kim, Optimum operation of asymmetrical-cells-based linear Doherty power amplifiers-uneven power drive and power matching, IEEE Trans Microwave Theory Tech 53 (2005), 1802-1809. 7. H.-I Pan and G.A. Rincon-Mora, Asynchronous nonlinear power-tracking supply for power efficient linear ABSTRACT: A low cost directive uniplanar broadband printed Quasi-Yagi antenna design is presented. As a particular realization, some prototypes have been designed to operate in the 2.45 GHz band. They have been then modeled, fabricated onto standard printed circuit dielectric substrate and tested successfully. For the design and the modeling processes, we have make use of FDTD based in-house developed algorithms. The obtained bandwidth is, for all the considered cases, better than 15%. The main radiation characteristics are 2-5.5 dBi gain, depending on the number of director elements, and better than 25 dB front-to-back ratio.Overall antenna size was, in any case lesser than 1 ϫ 0.5 .

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“…However, in order to overcome the structural problems of size in the horn type, horn antennas incorporating microstrip structures have been proposed for their compactness and simplicity. But their uses are limited by structural complexity that feeder and polarizer are separated [1], or limited to linear polarization [2]. Other approaches using microstrip feeding methods such as microstrip-fed cavity-backed slot antenna [3] and microstrip-fed horn antennas [4,5] have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Coplanar waveguide (CPW) was widely studied as an alternate to microstrip line for feeding square slot antenna in past few years, because they are compatible with the monolithic microwave integrated circuits (MMIC) and active device applications [1][2][3][4]. Besides, the CPW-fed slot antenna can also have relatively much wider impedance bandwidth than the conventional microstrip antenna [5,6].…”

Section: Introductionmentioning

confidence: 99%