5.8 GHz Notched UWB Bidirectional Elliptical Ring Antenna Excited by Circular Monopole with Curved Slot

Chawanonphithak, K.; Phongcharoenpanich, Chuwong; Kosulvit, S.; Krairiksh, M.

doi:10.1109/apmc.2007.4554874

Cited by 14 publications

(12 citation statements)

References 7 publications

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“…Thus UWB antennas with band-notched characteristic are necessary to ease this potential problem. Different antenna design methods have been proposed to produce the bandnotched characteristic in the UWB band [2][3][4][5][6][7][8][9][10]. Among these designs, etching different kinds of slots on the patch or ground of the antennas is most often used [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Ultrawideband antenna using CPW resonators for dual-band notched characteristic

Weng

Cheung

Yuk

2009

2009 International Conference on Wireless Communications &Amp; Signal Processing

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This paper presents the design and results of a compact Ultrawideband (UWB) monopole antenna with a dualband notched characteristic. The antenna consists of a semicircular radiator and a dual-coplanar-waveguide (CPW) resonator to produce two notched bands at the center frequencies of 3.5 and 5.5 GHz in the UWB region. The computer simulation results of the Voltage-Standing-Wave Ratio (VSWR), radiation pattern and peak gain of the antenna agree well with the measurements.

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Section: Introductionmentioning

confidence: 99%

Ultrawideband antenna using CPW resonators for dual-band notched characteristic

Weng

Cheung

Yuk

2009

2009 International Conference on Wireless Communications &Amp; Signal Processing

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“…The dielectric brick was realized with the use of a dielectric substrate placed under the feeding line and held by the SMA connector, as shown in Figure 4. [8,9,[11][12][13][14][15][16][17]. The reported antenna monopoles have rectangular [12,17], circular [8,9], or elliptical [11,16] shapes, and they can be fed by a coaxial cable or else by coplanar or microstrip lines.…”

Section: The Feeding Line and Manufacturingmentioning

confidence: 99%

“…Most designs utilize a thick, nonflexible dielectric material as an antenna substrate, which does not allow for its bending or application to curved surfaces. The coaxial cable-fed elliptical ring antenna reported in [16] was designed without the utilization of a substrate material, which allowed the obtaining of a bidirectional, symmetrical radiation pattern.…”

Section: The Feeding Line and Manufacturingmentioning

confidence: 99%

Coplanar Waveguide-Fed Broadband Microwave Devices with (or without) a Thin Dielectric Substrate for Use in Flexible Electronic Systems

Lech

Marynowski

Kusiek

et al. 2014

International Journal of Antennas and Propagation

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Two examples of microwave devices, fed by a coplanar waveguide and realized on a thin substrate (or without such a substrate), are employed to investigate the influence of devices’ curvatures and the proximity of different materials on their parameters. To perform the tests, a broadband antenna and a low-pass filter are chosen. A feeding coplanar waveguide is realized on a dielectric material brick attached to an SMA connector and the main device structure is placed in the air or on a thin substrate. The utilization of a thin substrate or its removal from the structure gives rise to the possibility of placing the devices on curved surfaces. The investigated devices are redesigned and manufactured. The antenna has a total size of 46 mm × 44 mm and covers a frequency range of 2.4–35 GHz which gives a 174% fractional bandwidth. The filter has a total size of 50 mm × 80 mm and its bandwidth has a cutoff frequency of 3.4 GHz. The obtained results are verified by measurements and good agreement is achieved.

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“…Antennas used in the front end co-design where designed with AR320 and measured at Supélec. The idea was to be based on a UWB dipole [6] for low cost and small size considerations at these frequencies, and to create rejection in unused band, based on results of [7], [8] and [9]. These types of monopole are considered to radiate thanks to edges of printed figures principally.…”

Section: ) Co-simulation Of the Class E Accordability With Antennas mentioning

confidence: 99%

Front end accordability for cognitive multi-radio, using a class E HPA and a multi-band antenna

Diet

Robert

Ribière-Tharaud

et al. 2008

2008 Asia-Pacific Microwave Conference

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1) Introduction, the front end ideaCognitive multi-radio front-end design is a challenge in terms of efficiency and wide bandwidth capability because it should be able to adapt the characteristics of any mobile and WLAN (Wireless Local Area Network) standards in L, S and C band. To summarize the functionality of this part of the transmitter architecture, the front end should be able to transmit at high power level a set of different wide modulation schemes such as multi-carrier ones, for (worst) example OFDM (Orthogonal Frequency Division Multiplex) 20 MHz, from 1 GHz to almost 6 GHz of carrier frequency. This implies the designer to combine high efficiency architecture with linearity and possibility of low power control. For several years, transmitters architectures based on high efficiency switched power amplifiers (PA) have been focused on, especially the class E PA [1][2] [3] which have been demonstrated to be useful in OFDM polar architecture such as EER [4] where amplitude information (supply modulation or PWM/Sigma-Delta coding) and power control (supply modulation) can be introduced. The idea of this paper is based on the possibility of detuning the class E PA with parallel RF switched capacitors. This principle was presented briefly in [5] with a 50 Ohms load, but was not yet studied in the real case of the antenna load. That is to say, the originality of this paper is to develop a methodology for the co-design of the class E PA with wideband and multibands antennas. We will underline the importance of the wideband antenna characteristic on the PA performance. The antenna adapted to multi-radio can present some rejection at frequencies where no standard exists in WLAN and mobile networks, from 2.7 GHz to 3.4 GHz for example. Taking the realistic wideband load due to the antenna changes the performances of the class E PA, and so the front end characteristics. This will be discussed in the following part. 2) Considered Class E topology with a E_PHEMT modelR 0.732 L 1.365 P V R = = = = = = = Figure 1 : Parallel topology for the class E (parallel inductor)The topology used in this paper is the "parallel topology" presented in [3] and [5], and is reported in figure 1. Its design employs a parallel inductor and suppresses the biasing inductance, with dedicated optimum values for the load resistance R 2 , parallel capacitor C 2 and inductor L 2 reported in figure 1. Simulation reports that the tuning of the class E network is directly dependent of the shunt capacitor value and a modification of the parallel capacitance enable a frequency shift control of the class E PA. To simulate this accordability, we choose a high frequency transistor for designing the PA and the parallel switches (with series capacitor). The transistor used to conceive the front-end is a GaAs E-PHEMT, Avago ATF50189. It's a high linearity, medium power FET : 29dBm output power at 1dB gain 978-1-4244-2642-3/08/$25.00 ©2008 IEEE

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5.8 GHz Notched UWB Bidirectional Elliptical Ring Antenna Excited by Circular Monopole with Curved Slot

Cited by 14 publications

References 7 publications

Ultrawideband antenna using CPW resonators for dual-band notched characteristic

Ultrawideband antenna using CPW resonators for dual-band notched characteristic

Coplanar Waveguide-Fed Broadband Microwave Devices with (or without) a Thin Dielectric Substrate for Use in Flexible Electronic Systems

Front end accordability for cognitive multi-radio, using a class E HPA and a multi-band antenna

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