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This week I have selected for you to discover:
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- New article: A Primer on Quadrature Amplitude Modulation (QAM)
- 5 Mini-Circuits products
I hope you will enjoy the read and look forward to be of further assistance to you.
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As always, please feel free to contact us with any questions you may have.
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MCDI continues to provide full-service despite the current situation, handling proposals, orders, and professional engineering support through all channels, including personal meetings.
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Shipments
Most airlines have ceased their flights to Israel, the remaining available flights are prioritized for critical supplies, leading to a severe lack of available cargo space and delays. The delays are due to force majeure and we are doing our utmost best to minimize them as much as possible.
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We recommend checking your current orders and expediting (where possible) your requested delivery dates. We are at your disposal to expedite shipments as much as possible to ensure their timely delivery. Contact us, and we will be happy to assist with any questions or concerns.
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As always, we are here for you.
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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. See Table 3 in Reference for a more detailed list of applications.
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In this article, we describe QAM using basic mathematics and illustrate how a QAM modulator operates. We introduce the concept of a constellation diagram and how it relates to the time domain plots for QAM modulation. A representative set of components is then utilized to design a functional QAM modulator by way of illustration. We conclude by describing how the QAM signal is demodulated at the receiver.
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SMT Gain Block
0.4 - 8 GHz, 50Ω
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The PMA3-83LP+ is a GaAs pHEMT based wideband, low noise, MMIC amplifier with a unique combination of low noise figure, high OIP3, and high output power. This makes it ideal for sensitive, high-dynamic range receiver applications. The PMA3-83LP+ design operates on a single supply voltage of +6V, is well matched for 50Ω, and comes in a low-profile package (3x3mm 12-Lead), …
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Coaxial RF Instrument Amplifier
0 - 4200 MHz, 50Ω
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Mini-Circuits’ ZHL-10M4G21W2+ is an instrument amplifier providing more than 1W of output power with a typical small signal gain of 44dB over the 10 to 4200 MHz frequency band. The amplifier uses state-of-the-art semiconductor technology and can be used in a wide range of applications. This model features a built-in digital step attenuator on the input providing gain control from …
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Lumped LC Band Pass Filter
130 - 150 MHz, 50Ω
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ZX75BP-140-S+ is a 50Ω bandpass filter in a connectorized package covering 130 to 150MHz. This offers good matching within the passband and high rejection in stopband.
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Lumped LC Band Pass Filter
230 - 297 MHz, 50Ω
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ZX75BP-263-S+ is a 50Ω bandpass filter in a connectorized package covering 230 to 297MHz. This offers good matching within the passband and high rejection in stopband.
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Absorptive SP4T, Solid State Switch
0.1 - 67 GHz, 50Ω
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Mini-Circuits’ RCS-1SP4T-A673 is a fast switching absorptive SP4T covering an ultra-wide bandwidth, from 0.1 to 67 GHz. The solid-state design features an impressive combination of high isolation, low insertion loss and good linearity across the entire band, with internal terminations on ports 1 to 4. The switch is supplied in a low profile package (3.35” x 2.62” x 0.575”) with …
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Tel: 03-7988118
Mobile: 054-4600801
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Tel: 03-6736696
Mobile: 054-2008813
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Our Engineering Team is here to help you!
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MCDI, Mini-Circuits Exclusive Representative in Israel, hosts a professional team of Application Engineers with decades of experience. Our Engineers are here to assist with identifying the products that are just right for you, advise on correct setups and solutions. They are just a phone call or an email away and also will be delighted to meet you at your location throughout Israel. You may call them directly by clicking on their picture or visit our support page.
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