Tallysman – TW3887

The TW3887 employs Tallysman’s unique Accutenna technology providing dual band GPS L1/L2, GLONASS G1/G2/G3 + BeiDou B1/B2 + Galileo E1/E5b coverage and is especially designed for precision dual frequency positioning.
The TW3887 features a precision tuned, circular dual feed, 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 TW3887 has a pre-filter which increases the antenna’s immunity to high amplitude signals, such as LTE and other cellular signals. The TW3887 offers excellent axial ratio and a tightly grouped phase center variation.
The antenna is supplied with a standard 60mm diameter circular ground plane, with a coaxial cable terminated with your choice of connector (right angle MCX is shown in the drawing). Mounting holes are provided for attachment to larger ground planes. Custom tuning and ground plane options may be available, depending on purchase level commitment.

Features

• Very low Noise Preamp, < 2.5 dB
• Axial ratio: <2 dB typ.
• Tight Phase Center Variation
• LNA Gain 35 dB typ.
• Low current: 24 mA typ.
• ESD circuit protection: 15 KV
• Invariant performance from: +2.5 to 16 VDC

Benefits

• Ideal for L1/L2 RTK surveying systems
• Great multipath rejection
• Increased system accuracy
• Great signal to noise ratio
• REACH, and RoHS compliant

Applications

• Precision GPS position
• Dual Frequency RTK receivers
• Mission Critical GPS Timing
• Military & Security
• Network Timing and Synchronization