ZK04BM USBPowered RF Low Noise Amplifier with Builtin Battery The ZK04BM LNA delivers performance RF amplification in a compact, portable package. Designed for users who need reliable lownoise gain across a wide frequency range, it is ideal for extending measurement capabilities and improving signal sensitivity in demanding applications. Key Features and Benefits: USBPowered Convenience Operates directly from a USB interface for easy use with a variety of devices. No external power supplies required. Designed for portability and field use. Builtin Battery for Mobility Integrated 300mAh rechargeable battery allows use without direct USB power. Long battery life with low power consumption (Charging 210mA, Total consumption 215mA), making it ideal for onsite measurements. Performance Across Multiple Frequencies Ultralow power and low noise design with stable gain performance: 20dB gain at 10MHz 12dB gain at 2GHz 7dB gain at 4GHz Can be used as a direct replacement for SPF5189Z or SPF5043Z modules. Consistent and Reliable Signal Quality Flatter and more uniform gain profile for precise measurements Reduced noise figure for cleaner signals and improved sensitivity Small and lightweight design for easy integration into portable setups Recommended Applications: 1. Frequency Measurements with tinySA ULTRA The builtin LNA in tinySA ULTRA is only effective below 3.5GHz. Adding the ZK04BM LNA significantly improves sensitivity at higher frequencies, such as 5.8GHz, making it a practical companion for extended range measurement tasks. 2. Portable RF Testing Ideal for technicians conducting RF analysis in the field without access to constant mains power. The builtin battery provides flexibility and mobility for remote work. 3. Laboratory and Research Use Suitable for experiments that require replacing common LNA modules like SPF5189Z or SPF5043Z, with improved noise performance and stable gain for accurate data collection. Important Usage Notes: For tinySA ULTRA users, do not use both the builtin LNA and the external ZK04BM LNA at the same time unless specifically required, as this may lead to undesired results. Avoid using a preamplifier in areas with strong background noise, as it can overwhelm the receiver or cause the automatic gain control circuit to reduce overall gain. The ZK04BM LNA combines portability, precision, and reliability to enhance RF measurement capabilities for professionals and enthusiasts.