No abstract

A novel compact shorted patch antenna with the bowtie‐type patch and the dual triangle portion to obtain a large bandwidth (790–970 MHz) is presented in this paper. Using shorted patches with via holes, a size reduction of 95.7% is achieved, as compared to that of the conventional half‐wave patch antenna. Moreover, it has 10‐dB return‐loss bandwidth of 20.4% for the GSM and CDMA bands. This proposed antenna exhibits not only a compact and a thin profile, but also wideband characteristics. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 4–6, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20884

PURPOSE: Excessive activity of the upper trapezius (UT) muscle contributes to a rounded shoulder posture (RSP) through abnormal rotation of the scapula that weakens the lower trapezius (LT) and serratus anterior (SA) muscles. This study compared the effects of two arm-lifting exercises with and without the use of a Thera-band on the activities of LT, SA, and UT muscles, and the LT/UT and SA/UT activity ratio in subjects with a rounded shoulder posture. METHODS: Sixteen subjects with RSP participated in this study. All subjects performed arm-lifting (AL), diagonal arm-lifting (DAL), arm lifting with isometric adduction (ALIA), and diagonal arm-lifting with isometric adduction (DALIA) exercises. The surface electromyography data, LT, SA, UT, and the LT/UT and SA/UT activity ratios were measured. A paired t-test was used to compare the differences between two arm-lifting exercises and two arm lifting with

By using a branch‐line ground plane, a monopole radiator, and parasitic patches, a newly compact cable‐fed antenna is investigated in order to overcome the thickness problem of the planar in‐ verted‐F antenna (PIFA). The designed antenna has dimensions of only 40 × 12 × 1 mm and the impedance bandwidth of the proposed antenna is able to cover the GSM, DCS, and PCS bands. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 469–471, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21019

In this study, a vehicle mounted antenna for RCIED jamming in the radio frequency band (30 MHz to 3 GHz) is proposed. The proposed antenna integrates a half‐bandwidth loop antenna and a slot antenna for bandwidth broadening. The antenna was made low profile for vehicle mounting. Simulation results produced a 800 mm (height, 0.08λ) × 3 240 mm (length, 0.32λ) dimension antenna that was ∼75% decreased in height compared to a 30 MHz broadband one wavelength loop antenna. The dimensions of the antenna were redesigned to 1/10 scale for convenient manufacturing and measurement. The redesigned 1/10 scale antenna was 80 mm (height, 0.008λ) × 324 mm (length, 0.032λ) according to the simulation and measurement results. The −10 dB bandwidth was 100:1(300 MHz to 30 GHz), so when scaled up by a factor of 10, the radio frequency band would be covered with a band of 30 MHz to 3 GHz. For the polarization sum pattern, the low frequency band showed an oval pattern, while the high frequency band showed a butterfly shaped pattern in the horizontal plane, confirming the suitability of the antenna design for RCIED jamming.