This week we will be at the European Microwave Week, Messe Berlin HUB27, Berlin 17-22 September. 

Updates from Mini-Circuits:

A Primer on Quadrature Amplitude Modulation (QAM)

While other modulation schemes discussed in this blog series (pulse, frequency, amplitude, phase) date back to the early chapters of RF engineering history, quadrature amplitude modulation (QAM) was first described by C. R. Cahn in 19602 and evolved steadily over the next few decades.  In the last 25 to 30 years, no modulation scheme has seen such widespread development and application as QAM. The technology has played a pivotal role in the industry’s ability to scale data speed and capacity with user demand by packing more data onto the carrier waveform and pushing a fixed channel bandwidth closer to Shannon’s limit. QAM modulation is used widely in cellular networks and backhaul, CATV networks and fixed wireless access points (802.11), and satellite communications to name a few. 

This article describes QAM using basic mathematics and illustrate how a QAM modulator operates. 

Read more:

New Product Release:


  • LTCC Low Pass Filter, 1W, 1210, 50Ω
    • LFCV-2302+, DC to 23 GHz

Together with our suppliers we are constantly working to shorten the time between order and delivery however due to current material shortage, lead times for some models are still longer than usual so please take this into account when placing your order.