SPE-12-8-072/D/SS

Page 2 of 9

1. Introduction

The AP.25J active GPS patch antenna is the highest gain GPS high performance

antenna currently available in the world. A 25mm GPS patch antenna with three

stage LNA delivers 40dB of gain. This product is suited for applications such as

timing applications for base stations or out-building installations which need long

cable lengths to the receiver, typically over lengths exceeding 5M at RG174 and

over 30M using low loss cable as CFD200 or LMR200.

2. Specification

2.1 Antenna

Parameter

Specification

Frequency

1575.42 ± 4MHz

Gain

Typ. 4dBic @ Zenith (for 70mm*70mm ground)

Impedance

50Ω

Polarization

RHCP

Axial Ratio

Max 3.0dB @ Zenith (for 70mm*70mm ground)

Dimension

25mm x 25mm x 8.5mm {Patch 25*25*4mm}

2.2 LNA

Parameter

Specification

Frequency

1575.42 ± 10MHz

Gain

Typ. 34dB (at 1.8V)

Min. 38dB, Typ. 40dB (at 3.0V)

Min. 38dB, Typ. 40dB (at 5.0V)

Noise Figure

Output Impedance

50Ω

Output VSWR

Max. 2.0

Outer Band Attenuation

F0=1575.42MHz

F0±50MHz 20dB min

F0±100MHz 25dB min