As factory for RF Passive components, most of our customer always asked us offer the Low PIM passive components, such as Low PIM power splitter, Low pim power tapper, Low PIM directional coupler etc. Why intermodulation is so important in wireless solutions? and how to improve it? Below are 3 tips. 1) Select the appropriate frequency point combination.  The channel point group without th...

Low-noise amplifier/LNA is a special kind of electronic amplifier, which is mainly used to amplify the signal received from the antenna in communication system, so as to facilitate the processing of electronic equipment in the later stage. Because the signal from the antenna is generally very weak, low noise amplifiers are generally located very close to the antenna to reduce the loss of the signa...

In Distributed Antenna Systems (DAS), Passive Intermodulation (PIM) is one of the most common yet overlooked causes of performance degradation. While DAS networks are designed to enhance wireless coverage and capacity, PIM can severely compromise signal quality, leading to dropped calls, reduced data throughput, and costly troubleshooting. This article outlines the practical measures and engineeri...

In modern communication networks, operators face a constant challenge: ensuring reliable, high-quality signal transmission while managing limited spectrum resources. With the rapid deployment of 4G and 5G networks, along with growing adoption of Distributed Antenna Systems (DAS) and indoor coverage solutions, RF passive components—particularly filters—have become essential tools for network optimi...

Anyone who has worked on distributed antenna systems will eventually have a head‑on fight with PIM. This post skips the fluff and only shows the engineering math. 1. Where PIM comes from — the formula Two frequencies f1, f2 pass through a non‑linear node (loose connector, oxidized plating, magnetic material) and generate intermodulation products: 3rd order: 2f1－f2 , 2f2－f1 5th order: 3f1－2f2 , 3f2...

Anyone who does base‑station maintenance or network optimisation eventually runs into this: uplink noise floor spikes, users complain about dropped calls and low throughput, yet VSWR tests pass and there are no equipment alarms. Where is the problem? At this point, you have two possible culprits – PIM (passive intermodulation) interference generated inside your own system, or external RF interfere...