This paper introduces a simple variable gain amplifier (VGA) structure that shows an inherently dB-linear gain control property. Requiring no additional components for dB-linear control, the structure is compact and power efficient. The designed two-stage VGA shows a gain control range of 60dB with the gain error in the range of ±0.4 dB. The power consumption including the output buffer is 20.4...

This paper try to probe the relation of distinguishing locally and distillation of entanglement. The distinguishing information (DI) and the maximal distinguishing information (MDI) of a set of pure states are defined. The interpretation of distillation of entanglement in term of information is given. The relation between the maximal distinguishing information and distillable entanglement is ga...

This paper explores, via literature review and focus group discussions, the relative importance that Master Data Management (MDM) plays in the implementation and maintenance of ERP systems. The focus group included key players of large-scale ERP implementations and/or upgrades, from both an internal intra-company and consulting standpoint. The findings of the discussions resulted in practical a...

A novel compact UWB antenna with 3.5/5.5 GHz dual notch-band characteristics is presented. The proposed antenna has a simple structure and compact size of 30 × 35mm2. Firstly, a compact modified rotated monopole antenna that covers UWB band is achieved. Then by inserting a λ/4 stub and etching two symmetrical λ/4 L-shape slots on the UWB antenna achieved before, a dual band-notched ultra-wideba...

An antenna mounted underneath the top cover of a wearable device, fed by an ultralow-profile connector, is proposed for Bluetooth-low-energy (BLE) communication at 2.4 GHz. As to be used it essential that should compact in size and tolerant against nearby medium change. The modified planar inverted-F (PIFA) we propose consists main patch parasitic element broaden bandwidth. end shorted miniatur...

In this paper we address the potential gain of using compact MIMO antenna array configurations in conjunction with High Altitude Platforms (HAPs) diversity techniques in order to increase the capacity in HAP communication systems. For this purpose, we also propose a novel compact MIMO antenna which we denote as the “MIMOOctahedron” and compare its performance with the vector element antenna. Si...