33-8825-00-3000

## TW8825 

## Multi-Constellation Dual-Band Antenna 

**Frequency Coverage:** GPS L1, L5 | GALILEO E1, E5a | BEIDOU B1, B2a | GLONASS G1 | NavIC L5 

The TW8825 employs Calian's patented Accutenna® technology providing dual-band GPS-L1/L5, GLONASSG1, Galileo E1/E5a, and BeiDou B1/B2a coverage and is especially designed for precision dual frequency positioning where light weight is important. 

The TW8825 features a precision tuned, circular dualfeed, stacked patch element. The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wide-Band LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output. 

The TW8825 offers excellent axial ratio and a tightly grouped phase centre variation. 

The TW8825 has a pre-filter which increases the antenna’s immunity to high-amplitude interfering signals, such as LTE and other cellular signals. A 100 mm diamter ground plane is recommended for optimal antenna performance. 

## Applications 

- Autonomous unmanned aerial vehicles (UAVs) 

- Precision GPS position 

- Dual-frequency RTK receivers 

- Mission Critical GPS Timing 

- Safety & security 

- Network timing & synchronization 

## Features 

- Very low noise preamp: 2.5 dB 

- Axial ratio: < 2.0 dB typ. 

- Tight phase centre variation 

- High-gain LNA: 26 dB typ. 

- Low current: 12 mA typ. 

- ESD circuit protection (15 kV) 

- Invariant performance from 2.5 to 16 VDC 

## Benefits 

- Lightweight (52g excluding cable and connector) 

- Ideal for L1/L5 RTK surveying systems 

- Great multipath rejection 

- Increased system accuracy 

- Excellent signal-to-noise ratio 

- IP67, REACH, and RoHS compliant 

About Calian: With global headquarters and manufacturing in Ottawa, Canada, Calian is a leading manufacturer of highprecision antennas and components for Global Navigation Satellite System (GNSS) applications. Calian’s mission is to support the needs of a new generation of positioning systems by delivering unprecedented antenna precision at competitive prices. Learn more at www.calian.com/gnss 

Contact us: info.gnss@calian.com T: +1 613 591-3131 

202412 

Revision: 

**Frequency Coverage:** GPS L1, L5 | GALILEO E1, E5a | BEIDOU B1, B2a | GLONASS G1 | NavIC L5 

## Multi-Constellation Dual-Band Antenna 

Antenna - Measured with a 100 mm ground plane Technology Dual-feed Stacked RHCP ceramic patch 

Low Noise Amplifier (LNA)  - Measured at 3V and 25 ° C 

Frequency Bandwith Out of Band Rejection Gain Axial Ratio Upper Band Lower Band dBic typ. at Zenith dB at Zenith GNSS 1559 - 1606 MHz 1165 - 1189 MHz > 35 dB @ < 1450 MHz > 40 dB @ < 1170 MHz ~~a~~ L1 4.0 ≤ 2 dB > 30 dB @ < 1520 MHz> 35 dB @ > 1650 MHz > 30 dB @ < 1190 MHz > 32 dB @ > 1290 MHz GPS / QZSS L2 - - ~~eeee~~ L5 3.5 ≤ 2 dB ~~a ee ee a~~ G1 3.5 ≤ 2 dB GLONASS G2 - - Architecture Pre-filtered ~~ee~~ G3 ~~ee~~ - ~~eee~~ - Gain 27 dB typ., 26 dB min. ~~ee ee ee ee~~ E1 4.0 ≤ 2 dB Noise Figure 2.5 dB typ. E5A - - VSWR < 1.5:1 typ., 1.8:1 max Galileo ~~ee~~ E5B ~~ee~~ - - Supply Voltage Range 2.5 to 16 VDC nominal, up to 50mV p-p ripple ~~ee~~ E6 - ~~ee~~ - Supply Current 12 mA typ. ~~es eeee~~ ~~**ee** ee~~ B1 4.0 ≤ 2 dB ESD Circuit Protection 15 kV air discharge B2b - - P 1dB Output 8 dBm typ. BeiDou ~~ee~~ B2a ~~ee~~ - - Group Delay - ~~es~~ B3 - ~~ee~~ - PCO - ~~es ee ee~~ IRNSS / NavIC L5 3.5 ≤ 2 dB ~~rees~~ QZSS ~~ee~~ L6 ~~eeee~~ - ~~ee~~ - ~~a~~ Mechanical Diagram - Units in 'mm' L-Band Services (1525 MHz - 1559 MHz) - - es Satellite Communications a | ~~ee~~ Iridium ~~aee~~ - ~~eee~~ - 2473 pan Globalstar - - Other e| «3 Axial Ratio at 10° - Efficiency - ~~a~~ PC Variation ~~ee~~ - ~~ee~~ aM ~~es ee ee~~ ! ~~—~~ Mechanicals | Size 47.3 mm (Dia.) x 18.3 mm (H.) Weight 52 g D2.8_| Radome LEXAN™ EXL9330, Base: Zamac Metal Mount Magnet or Adhesive Tape Available Connectors Please see ordering guide a! 4.5 Environmental Operating Temperature -40 °C to +85 °C Storage Temperature -55 °C to +95 °C Vibration MIL-STD-810E Method 514.3-1 Shock Vertical axis: 50 G, other axes: 30 G Salt Fog MIL-STD-810-F - Test Method 509.5 Ordering Information IP Rating IP68 Part Number 33-8825-xx-yyyy Compliance IPC-A-610, FCC, RED / CE Mark, RoHS, REACH Where xx = connector type, yyyy = cable length in mm (all 4 digits required) Warranty Parts and Labour 3-year standard warranty Please refer to our to review available radomes and connectors at: 

Ordering Information Part Number 33-8825-xx-yyyy Where xx = connector type, yyyy = cable length in mm (all 4 digits required) Please refer to our Ordering Guide to review available radomes and connectors at: https://at.calian.com/gnss/information-support/part-number-ordering-guide/ 

© 2025 Calian Ltd. All rights reserved. Calian, the “Confidence. Engineered.” tag line and the Calain logo are trademarks or registered trademarks of Calian Inc. and/or its affiliates in Canada and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The information presented is subject to change without notice. Calian assumes no responsibility for any errors or omissions in this document. Calian hereby disclaims any or all warranties and liabilities of any kind. 

Revision: 202412