GNSS Products

Documents

pdf Antenna Product Overview

pdf Comparing GNSS Antenna Performance

pdf White Paper – GNSS Antennas

pdf GNSS Antenna Presentation

pdf TW3072 Timing Antenna Install

pdf4000 Series White Paper – New Challenges for GNSS Patch Antennas

pdfTallysman TW4000 Series White Paper

pdfPatch Antennas for the New GNSS (GPS World Article Feb /12)

STMicroelectronics GPS + GLONASS Simulation

Multi-constellation GNSS

Download TW4320/TW4322 Datasheet

TW4320/TW4322 Wideband GPS/GLONASS Antenna

The TW4320/TW4322 is a wideband GNSS antenna covering the GPS L1, GLONASS L1 and SBAS (WAAS, EGNOS & MSAS) frequency bands (1575 to 1606 MHz). It features a small patch element with 50% wider bandwidth than previously available in this format. Unlike its competitors, both GPS-L1 and GLONASS signals are included in the 1dB received power bandwidth. The TW4320/TW4322 has a two stage Low Noise Amplifier with a mid-section SAW. A tight pre-filter is available in the TW4322 to protect against saturation by high level sub- harmonics and L-Band signals. Even with the wider bandwidth, the TW4320/TW4322 antenna is among the smallest high performance antenna available. It is housed in a compact IP67 magnetic mount enclosure. It comes with 3 metres of cable and a wide range of connectors.

Applications Features Benefits
  • Cost Sensitive Mission Critical Positioning
  • Military & Security
  • Covert surveillance
  • Fleet Management & Asset Tracking
  • 50% wider bandwidth in the same format
  • Axial ratio: 6 dB max
  • Low noise LNA: 1 dB
  • High rejection mid-section SAW filter
  • Available Pre-filter (TW4322)
  • High gain: 28 dB typ.
  • Wide voltage input range: 2.5 to 10 VDC
  • Bandwidth fully Includes GPS-L1 & GLONASS
  • Excellent multipath rejection
  • Excellent signal to noise ratio
  • RoHS compliant
  • Ideal for harsh environments
  • Excellent out of band signal rejection

Specifications

Antenna
Architecture Wideband Single Feed Patch
1 dB Bandwidth 31 MHz
10dB Return Loss Bandwidth 45 MHz
Antenna Gain (with 100mm ground plane) 4.5 dBic
Axial Ratio over Bandwidth (over full bandwidth) 4dB @ Fcenter, 6 dB max
Electrical
Architecture LNA stage 1 → SAW filter → LNA stage 2 (TW4320) SAW Prefilter →LNA stage 1 → SAW filter → LNA stage 2 (TW4322)
Filtered LNA Frequency Bandwidth 1574 to 1606 MHz
Polarization RHCP
Gain 28dB min., 1575.42 to 1606 MHz
Gain flatness +/- 2 dB, 1575 to 1606 MHz
GPS Out-of-Band Rejection < 1500 < 1550 > 1640   > 32 dB > 25 dB > 35 dB
VSWR (at LNA output) <1.5:1
Noise Figure 1 dB typ.(TW4320) & 2.5 dB typ. (TW4322)
GPS Supply Voltage Range (over coaxial cable) +2.3 to 10 VDC nominal
GPS Supply Current 12 mA max.
ESD Circuit Protection 15 KV air discharge
Mechanicals & Environmental
Mechanical Size 38mm x 38mm dia. x 14.3mm H
Connectors SMA male, others available
Cables RG174 / 3 metres, other lengths optional
Operating Temperature. Range 40 to +85°C
Enclosure Radome and base: ASA plastic
Weight 50g
Attachment Method Magnetic
Environmental IP67 and RoHS compliant
Shock Vertical axis: 50 G, other axes: 30 G
Vibration 3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G
Warranty One year, parts and labour
Ordering Information
32-4320-xx-yyyy TW4320 – GPS/Glonass Antenna, 3 metre cable, SMA Male
32-4322-xx-yyyy TW4322 – GPS/Glonass Antenna, with pre-filter, 3 metre cable, SMA Male
Download TW4320/4322 Datasheet

The information provided herein is intended as a guide only and is subject to change without notice. This document is not to be regarded as a guarantee of performance. Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind. © 2012 Tallysman Wireless Inc. All rights reserved.