Hanphil Rhyu

DVB-H Antenna Design Using Folder-Type Chassis and Coupling Element on a Ferrite

This letter presents a new design concept of the digital video broadcast-handheld (DVB-H) antenna using the folder-type chassis and coupling element on a ferrite. By utilizing the chassis as a radiator in conjunction with a compact coupling element on a ferrite, the antenna achieves DVB-H operation without an additional matching circuit. The measured result shows the wide bandwidth of 250 MHz (VSWR< 6) with sufficient peak gains over -5 dBi in the DVB-H band.

Internal DTV antenna on multilayered ferrite substrate for mobile phone applications

By using a multilayered ferrite substrate, a compact internal DTV (digital television) antenna is proposed. The antenna is constructed on the ground plane of a clamshell-type mobile phone. It is suitable for a DVB-H band (VSWR<3), and it has over -10 dBi gain which is acceptable for a practical digital television signal reception.

Folded planar monopole internal antenna for multi-band mobile phones

A new folded planar monopole antenna is proposed for multiband operations. Measured impedance bandwidth (VSWR<3) is 20% (820~1000MHz) and 119.8% (1570~6270MHz) in low and high frequency, respectively. The proposed antenna can effectively cover most mobile communication bands (CDMA, GSM, GPS, DCS, PCS, and UMTS), WiBro, S-DMB and WLAN.

Design of a multi-band internal antenna using an open stub

An internal antenna for GSM (880/spl sim/920MHz), DCS (1710/spl sim/1880MHz), and US-PCS (1850/spl sim/1990MHz) mobile handset is proposed. The antenna is designed to have a multi-band operation and includes feed line, patch and matching stub. It has a single radiating element and operates in multi-band by a matching circuit. The measured peak gain is 0.11dBi, 1.65dBi and 0.13dBi for GSM, DCS, and US-PCS, respectively.

Compact internal antenna using a ferrite material for DVB-H reception in mobile phones

A compact internal antenna with a partially filled ferrite substrate for DVB-H (digital video broadcast for handheld) reception in a mobile phone is proposed. Ferrite substrate whose relative permittivity (epsivr ) and permeability (mur) are 7 and 18, respectively, is used to effectively reduce the antenna size. Measured results show that the proposed antenna can work well for DVB-H applications.

Compact PIFA / slot antenna for quad-band mobile handset applications

An internal PIFA/slot antenna for quad-band mobile handset applications is presented. The quad-band operation for the bar-type mobile handset is obtained by the resonant modes of the slot antenna in conjunction with those of the PIFA. The proposed antenna has a compact size of 42×10×4 mm³. The quad-band operation includes GSM850 (824–894 MHz), GSM900 (880–960 MHz), DCS1800 (1710–1880 MHz), and PCS1900 (1850–1990 MHz).

Electrical loop for 433.92 MHz reader antenna of RFID systems

A reader antenna for active RFID technology at 433.92 MHz, used for cargo container security, is proposed. The proposed antenna consists of two layer radiating elements excited by a single probe simultaneously. An omnidirectional radiation pattern with Phi-component of electric field is obtained by an electrical loop with uniform and in-phase current as the radiating source. Measured peak gain is 2.9 dBi, and the average gain is 0.92 dBi in x-y plane

Internal antenna for multiband mobile handset applications

Design of a multiband internal antenna for mobile handset applications is presented. Two antenna elements are formed on top and bottom of the common substrate and connected by metallic pin. Resonant frequency of each element is almost independent. Matching the impedance with the slit, a wide bandwidth is achieved so that the operating frequency bands include GSM (880-960 MHz), GPS (1575 MHz), DCS (1710-1880 MHz), USPCS (1850-1990 MHz), and UMTS (1885-2200 MHz). Radiation patterns are omni-directional for all frequency bands. Details of the proposed antenna as well as the measured results are presented