TW4421 Wideband Dual-Feed GPS/GLONASS Antenna
This low-cost dual-feed GPS & GLONASS magnetic mount antenna by Tallysman Wireless covers the GPS L1, GLONASS G1 and SBAS (WAAS, EGNOS & MSAS) frequency band (1574 to 1606 MHz). The TW4421 features a novel 25mm dual feed wideband patch element that provides excellent multipath rejection and a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth. It is especially suited to high accuracy applications; it also offers high out-of-band signal rejection.
The two feeds from the patch element are summed in a 90 degree hybrid then input to a first-stage Low-Noise Amplifier (LNA), followed by a mid-section SAW and a second low-noise gain stage.
The TW4421 is one of the smallest dual-feed, high-performance antennas available. It comes with a wide range of connector options and cable length and is housed in a compact IP67 magnetic mount enclosure.
If you want a pre-filter option, please see the TW4422. It has a pre-filter which increases the antennas immunity to high amplitude interfering signals, such as LTE and other cellular signals
- Cost Sensitive Mission Critical Positioning
- Military & Security
- Covert surveillance
- Fleet Management & Asset Tracking
- Dual feed patch element
- 40% wider bandwidth, small footprint
- Axial ratio: 3 dB Max. (GPS & GLONASS)
- Low noise LNA: 1 dB
- High rejection mid-section SAW filter
- High gain: 28 dB typ.
- Wide voltage input range: 2.5 to 16 VDC
- 1dB Bandwidth Includes GPS-L1 & GLONASS
- Greatly enhanced multipath rejection
- Improved GNSS reliability
- Excellent signal to noise ratio
- RoHS compliant
- Ideal for harsh environments
- Excellent out of band signal rejection
LNA Pre-filter Available
If you need enhanced protection against high level sub-harmonic signals like LTE and near frequency signals such as WiFi, the alternative provides these additional TW4422 benefits with an LNA pre-filter.
To minimize performance impact from signal jamming threats, the pre-filtered version of this antenna is compatible with Tallysman’s Anti-Jamming add-on, which modifies the radiation pattern of the GNSS antenna to eliminate signals arriving from -10° to +15° from horizon, while slightly increasing the gain of the antenna at zenith.
Tallysman Connector and Cable Options
Tallysman offers a number of connector and cable options for its antennas. Use the guide below to find the available options for your antenna or contact us for help.
Tallysman Part Number Ordering Guide