VJ3505M011SXMSRA0【PDF 1/6 页】ANTENNA 470-860MHZ UHF SMD

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VJ 3505 UHF Chip Antenna for Mobile Devices

www.vishay.com

For technical questions, contact: mlcc@vishay.com

Document Number: 45158

Revision: 26-Aug-10

VJ 3505

Vishay Vitramon

The companys products are covered by one or more of the

following:

WO2008250262 (A1), US2008303720 (A1),

US2008305750 (A1), WO2008154173 (A1).

Other patents pending.

DESCRIPTION

The VJ 3505 multi-layer ceramic chip antenna is a small

form-factor, high-performance, chip-antenna designed for

TV reception in mobile devices in the UHF band. It allows

mobile TV device manufacturers to design high quality

products that do not bear the penalty of a large external

antenna. Utilizing Vishay's unique materials and

manufacturing technologies, this product complies with the

MBRAI standard while maintaining a small outline.

Focusing on consumer applications, the antenna is designed

to be assembled onto a PC board in the standard reflow

process.

Target customers of the VJ 3505 are mobile phone makers,

portable multimedia device makers, notebook OEMs and

ODMs, and accessory card OEMs and ODMs.

FEATURES

" Small outline (35 mm x 5 mm x 1.2 mm)

" Omni-directional, linear polarization

" Complies with MBRAI standard

" Complete UHF band coverage (470 MHz to 860 MHz) up

to 1.1 GHz

" Requires a tuning circuit and ground plane for optimal

performance

" Standard SMT assembly

" 50 ?unbalanced interface

" Operating temperature range (- 40 癈 to + 85 癈)

" Reference design and evaluation boards available upon

request

" Compliant to RoHS directive 2002/95/EC

APPLICATIONS

" Mobile UHF TV receivers including DVB-T, DVB-H,

ISDB-T, CMMB, ATSC, and MediaFLO devices

ANTENNA PERFORMANCE

Peak gain and efficiency

The antenna radiation characteristics are influenced by

several factors including ground plane dimensions and

impedance matching network.

The antenna parameters presented hereafter were

simulated according to the ground plane configuration

suggested by the VJ 3505 evaluation board.

Figure 1. shows simulated peak gain and radiation efficiency

over frequency throughout the UHF band, compared with the

MBRAI requirements.

Fig. 1 - Peak Gain and Efficiency vs. Frequency

VJ 3505 Simulated Antenna Parameters

- 12

- 10

- 8

- 6

- 4

- 2

n MHz

470 520 570 620 670 720 770 820 870

Radiation

Efficiency

MBRAI

Peak Gain

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