In this article, a compact multiband monopole antenna is proposed to cover the frequency band for wireless local area network and worldwide interoperability for microwave access application. The multiband monopole antenna has the advantage of compact size of 15 × 30 mm2. The proposed antenna is an S‐shaped strip connected with a notched rectangle loop radiation patch with a ground plane, and there is a slot in the ground plane. The two lower bands are achieved by the rectangle loop patch and the higher band is achieved by the slot in the ground plane. The impedance bandwidth for 10 dB return loss at 2.46, 3.8, and 5.4 GHz, are from 2.4 to 2.51 GHz, 3.20 to 4.07 GHz, and 5.08 to 5.85 GHz, respectively. Experimental results show that the antenna gives omnidirectional radiation patterns and stable antenna gains in the operating bands with the compact size. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1809–1812, 2014

Inducible degrader of the low-density lipoprotein receptor (IDOL) is an E3 ubiquitin ligase mediating degradation of low-density lipoprotein (LDL) receptor (LDLR). IDOL also controls its own stability through autoubiquitination, primarily at lysine 293. Whether IDOL may undergo other forms of post-translational modification is unknown. In this study, we show that IDOL can be modified by small ubiquitin-like modifier 1 (SUMO1) at the K293 residue at least. The SUMOylation of IDOL counteracts its ubiquitination and augments IDOL protein levels. SUMOylation and the associated increase of IDOL protein are effectively reversed by SUMO specific peptidase 1 (SENP1) in an activity-dependent manner. We further demonstrate that SENP1 affects LDLR protein levels by modulating IDOL. Overexpression of SENP1 increases LDLR protein levels and enhances LDL uptake in cultured cells. On the contrary, loss of SENP1 lowers LDLR levels in an IDOL-dependent manner and reduces LDL endocytosis. Collectively, our results reveal SUMOylation as a new regulatory post-translational modification of IDOL, and suggest that SENP1 positively regulates the LDLR pathway via deSUMOylation of IDOL and may therefore be exploited for the treatment of cardiovascular disease.

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In this article, a frequency selective surface (FSS) cell is proposed. The band stop frequency performance is compared between the two and four layer FSS structure with the proposed cells. The four‐layer structure has the same low frequency as the two‐layer structure, but the four‐layer structure has 3.6 GHz wider stop band in high frequency. Then, a reflector with the proposed EBG cells for ultrawideband antenna is developed. The performance for the reference antenna with and without the proposed reflector was compared, the average improvement of the front‐to‐back ratio of the UWB antenna with designed FSS reflector is 15 dB from 3.1 to 10.6 GHz and the peak even can get to 30 dB at 5 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2541–2544, 2013