Product Overview Our SFE-402-405 cavity band stop (notch) filter delivers precise suppression of RF interference across the 402–405 MHz band. Built for lab and field RF systems, this compact reject filter provides minimum 55 dB deep attenuation inside its target stopband, blocking unwanted interfering signals while fully preserving clean out-of-band signals. Rated for 2 Watts…

Concludes Successfully From September 23rd to 25th, 2025, the world's premier microwave event—EuMW 2025—successfully commenced in Utrecht, Netherlands! ESJ showcased its core technologies and solutions, concluding its overseas exhibition journey successfully and demonstrating the robust strength of "Made in China." Themed "Waves of Innovation," this year's exhibition brought together nearly 5,000 industry professionals and over…

In high-frequency microwave systems, such as phased array radars, electronic warfare (EW) modules, and wideband laboratory testing, maintaining signal integrity is paramount. Designing broadband 2-18GHz 12-Way power splitters requires a meticulous balance of physical layout and electrical performance. As the number of output channels scales up to twelve, managing key RF parameters—specifically phase balance and…

We are pleased to launch the 1W 110GHz (P/N:FAE1-110-YA) Precision Attenuator, a cutting-edge solution for high-frequency signal conditioning in aerospace, telecommunications, and test & measurement. Combining exceptional performance, rugged design and flexible configuration, it is ideal for global engineers and system integrators. Operating at 110GHz (W-band), this attenuator offers 1W CW maximum input power, meeting…

300–700 MHz UAV Power Amplifier for Mission-Critical Drone Communication The PAE-0.3-0.7 is a high-performance 300–700 MHz power amplifier specifically engineered for mission-critical unmanned aerial vehicle (UAV) communication. Operating in the UHF band, this robust UAV power amplifier delivers exceptional diffraction capabilities, long-range RF transmission, and superior resistance to non-line-of-sight (NLOS) interference. Whether deployed in civilian,…

Communication base stations are the core infrastructure of wireless communication networks, and microwave components serve as the key building blocks of the base station's RF front-end and signal processing units. They are responsible for critical functions such as signal amplification, filtering, distribution, coupling, and attenuation, directly determining the signal quality, coverage range, and operational stability…

With the rapid development of unmanned aerial vehicle (UAV) technology, its application in military reconnaissance, logistics transportation, agricultural monitoring, emergency rescue and other fields is becoming more and more extensive. The RF amplifier in the 300-700MHz frequency band has become a key component of the communication and measurement and control system of drones due to…

To address the specific operational needs of our valued customers, ESJ has recently developed and launched a customized dual junction circulator. Tailored for professional applications, this high-performance component covers a frequency range of 0.8-1GHz, a band widely utilized in various communication and electronic systems. A standout feature of this dual junction circulator is its low…