US Robotics USR3500 Guia de Instalação descarregar pdf (Página 41)

Rev 1.1 9/22/14 41

8.1.2. GPS Antenna

Table 23. GPS Antenna Description

Mechanical

Weight

< 110 grams

Size

49x39x14mm

Cable

RG174/U 3meters

Connector

MMCx m. right angle

Mounting

Magnetic base

Housing

Black

Dielectric Antenna

Center Frequency

1575.42MHz ± 3 MHz

V.S.W.R

1.5 : 1

Band Width

±5 MHz

Impedance

50Ω

Peak Gain

> 3dBic Based on 7x7cm ground plane

Gain Coverage

> -4dBic at –90°< 0 < +90°(over 75% Volume)

Polarization

RHCP

LNA / Filter

LNA Gain (without cable)

28dB (typical)

Noise Figure

1.5dB

Filter Out Band Attenuation

(f0=1575.42 MHZ)

7dB Min f0+/-20MHZ

20dB Min f0+/-50MHZ

30dB Min f0+/-100MHZ

V.S.W.R

< 2.0

DC Voltage

3.0V to 5.0V

DC Current

10mA Max

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