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This work presents a novel broadband monopole antenna for digital video broadcasting-terrestrial (DVB-T) application. The proposed antenna consists of a multiple-ring radiating patch and a sleeve-shaped ground plane. The multiple-ring monopole is used to realize the antenna height reduction at a fixed operating frequency. It shows a wide operating 2.5 : 1 VSWR bandwidth of 408 MHz achieved by using an impedance-matching technique. The technique applies cutting a notch at the ground plane opposite to the microstrip line and adjusting the height of the sleeve-shaped ground. The proposed antenna can operate in the 463-871 MHz frequency range and cover the DVB-T operating bandwidth (470-862 MHz). The radiation pattern of the proposed antenna in the xy-plane is omni-directional with a peak antenna gain of 4.2 dBi.

This paper proposed a wireless power harvesting system with micro-electro-mechanical-systems (MEMS) fabrication for noninvasive intraocular pressure (IOP) measurement on soft contact lens substructure. The power harvesting IC consists of a loop antenna, an impedance matching network and a rectifier. The proposed IC has been designed and fabricated by CMOS 0.18 um process that operates at the ISM band of 5.8 GHz. The antenna and the power harvesting IC would be bonded together by using flip chip bonding technologies without extra wire interference. The circuit utilized an impedance transformation circuit to boost the input RF signal that improves the circuit performance. The proposed design achieves an RF-to-DC conversion efficiency of 35% at 5.8 GHz.

A broadband antenna integrated with the system ground plane of the Portable Media Player (PMP) device for digital television (DTV) signal reception is proposed. The antenna comprises of a quarter-wavelength monopole and a gaps-coupled open loop antenna that can generate two adjacent resonant modes to form a wide operation band. Result shows a wide bandwidth of 464-856 MHz to cover the DTV signal reception in 470-806 MHz band Details of the proposed antenna designs and experimental results of the construct prototypes are presented.

A novel annular monopole antenna with a dual‐band rejection characteristic for ultra‐wideband (UWB) applications is proposed.This antenna comprises an annular‐shape radiating element with a tuning stub and a backside elliptical radiating element that is connected to it by a shorting pin, to create dual‐notched bands at 3.2–4.4 GHz and 4.8–5.9 GHz across the UWB frequency band from 2.5 to 14.5 GHz, to filter the WIMAX and WLAN signals. Measurements demonstrate that the proposed antenna provides a very large bandwidth from 2.5 to 14.5 GHz (141%, voltage standing wave ratio 2). A good monopole‐like radiation pattern except the notched bands is obtained. Details of the proposed antenna design and the simulated results are presented and discussed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1546–1549, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27609

A novel ultra‐wideband design of planar elliptical monopole antenna with dual radiating elements is presented. The proposed antenna consists of two elliptical radiating elements and a ground plane. The antenna has a super‐wideband from 2.8 to 15 GHz for voltage standing wave ratio less than 2, except the notched band at 4.8–5.9 GHz for filtering the wireless local area network signal. Based on the contribution of the shorting position d to the notch bandwidth, a particular notch‐band range can be designed by adjusting the size of the minor elliptical radiating element. The radiation pattern of the proposed antenna in the yz‐plane is omni‐directional. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1427–1430, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26023

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