Agilent/Keysight 58504A GPS L1 carrier antenna

The Agilent/Keysight 58504A is a GPS L1 carrier antenna engineered to receive signals at 1575.42 MHz with high gain and minimal noise contribution. It delivers > 30 dBi gain (38 dBi typical at 90° elevation) and a noise figure of 1.5 dB typical, supporting accurate timing and frequency synchronization across GPS-dependent systems. The antenna features right-hand circular polarization, 50 Ω nominal impedance, and integrates via a female TNC-type connector.

– Technical Specifications

• Frequency Range: 1575.42 MHz ± 5 MHz (L1 carrier)
• Total Gain: > 30 dBi (38 dBi typical at 90° elevation angle)
• Impedance: 50 Ω nominal
• Polarization: Right-hand circular
• Noise Figure: 1.5 dB typical
• VSWR: < 2.5:1 (1.5 typical)
• Operating Voltage: +5 VDC ± 0.5 VDC (+4.5 VDC to +5.5 VDC range)
• Operating Current: 20 mA typical; 32 mA max
• Connector: Female TNC-type antenna connector
• Operating Temperature Range: −40°C to +80°C
• Diameter: 88.9 mm (3.5 in)
• Thickness: 20 mm (0.8 in); 42 mm (1.6 in) with collar adapter

– Key Features

• Low noise figure minimizes signal degradation in timing-critical applications
• High gain supports extended cable runs and weak signal reception
• Circular polarization accommodates satellite orientation variations
• Low power consumption (< 27 mA typical) suits battery and distributed systems
• Compact form factor fits confined installation spaces
• Wide operating temperature range addresses outdoor and extreme environments

– Typical Applications

• Precision timing and frequency synchronization
• GPS receiver front-end stages
• Network time protocol (NTP) distribution systems
• Phase measurement and synchronization networks
• Mobile base station timing references

– Compatibility & Integration

The 58504A integrates into broader Keysight GPS systems via complementary accessories: environmental covers and ground planes (58510A), integrated antenna assemblies with mast and ground plane (58513A), lightning protection (58505B), line amplifiers for extended cable runs (58509A/58509F), L1 bandpass filtering (58514A), signal distribution amplifiers (58515A, 58516A, 58517A), and low-loss LMR 400 cables (58520A/58521A).