Circular dipole antennas for lower and upper UWB bands with integrated balun

Karlsson, Magnus; Osth, Joakim; Owais,; Serban, Adriana; Gong, Shaofang

doi:10.1109/icuwb.2009.5288793

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Initially, the frequency band, 3.1–10.6 GHz, was opened for commercial use of ultra‐wideband (UWB) radio by the Federal Communications Committee [1–13]. In the beginning, the 3.1–4.8 GHz, also known as the Mode 1, band group quickly became the primary frequency band.…”

Section: Introductionmentioning

confidence: 99%

Surface properties of Reverse osmosis membrane

Yao

Guo

Zhang

2007

J of Applied Polymer Sci

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The morphology and structure of the top surfaces of three commercially Reverse osmosis (RO) membranes (Vontron Eviro-Tech) have been studied using SEM and AFM techniques. As a result, the unevenness of the surface of ULP21 membrane was the greatest and that of SW21 membrane was smooth. The more the roughness of the top surface of the RO membranes was, the larger the flux of the RO membranes was. Accordingly, the roughness of the top surface of RO membranes intensively affected on the performance of RO membrane.

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Section: Introductionmentioning

confidence: 99%

Surface properties of Reverse osmosis membrane

Yao

Guo

Zhang

2007

J of Applied Polymer Sci

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Dipole antenna with integrated balun for ultra‐wideband radio 6–9 GHz

Karlsson

Owais

Osth

et al. 2010

Micro & Optical Tech Letters

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so that all of the stubs and their unit elements could be realized as spurlines. Figure 8 shows a photograph of the filter. Figure 9 compares the measured and calculated values of insertion and return loss. Some bandwidth contraction is evident. This is due to the stubs not resonating at the exact design frequencies, because of stray coupling. In a further cycle, this can be easily corrected. The measured values do, however, show excellent correspondence with the calculations.ABSTRACT: A fully integrated dipole antenna with a balun for ultrawideband (UWB) radio in the band 6-9 GHz utilizing a flexible and rigid printed circuit board is presented in this article. The balun utilizes broadside-coupled microstrips and is integrated in the rigid part of the printed circuit board, whereas the radiator is placed in the flexible part. The antenna with the balun covers the frequency-band 6.0-8.5 GHz at voltage standing wave ratio (VSWR) < 2.0, and 5.5-11.0 GHz at VSWR < 2.5. Moreover, simulated and measured radiation patterns and antenna efficiency above 86.0% are observed.

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