Wireless communication and radar systems are under continuous pressure to reduce size, weight, and power while increasing dynamic range and bandwidth. The quest for higher performance in a smaller package motivates the use of IQ mixers: mixers that can simultaneously mix ‘in-phase’ and ‘quadrature’ components (sometimes called complex mixers). System designers use IQ mixers to eliminate or relax the requirements for filters, which are typically the largest and most expensive components in RF & microwave system designs. IQ mixers use phase manipulation to suppress signals instead of bulky, expensive filters.
The goal of this application note is to introduce IQ, single sideband (SSB), and image reject (IR) mixers in both theory and practice. We will discuss basic applications, the concepts behind them, and practical considerations in their selection and use. While we will focus on passive diode mixers (of the type Marki Microwave sells), the concepts are generally applicable to all types of IQ mixers and modulators.
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Custom MMIC are excited to announce that their catalogue of standardized GaAs and GaN designs has reached over 150 devices.
Recent product releases include: an ultra-wideband 0.5W distributed driver amplifier that operates from DC - 30GHz with high linearity; a new digital attenuator family with options to 40GHz, broadband switches covering DC-18GHz, a 5-bit phase shifter, high IP3 mixers, low phase noise amplifiers (LPNAs), and an industry-leading 0.5 dB low noise amplifier (LNA).
Custom MMIC deliver many devices and their evaluation boards from stock, and offer rapid and efficient space qualification on most models. Over a dozen models are currently qualified to Class K requirements.
A breakthrough in the design of medical device cables is the major step toward thinner, more flexible and higher capacity data signals utilised in catheters. The innovation, named Multi-Channel Transmission (MCT), is set to challenge existing twisted pair coaxial and Flexible Printed Circuit (FPC) technology and will enable new data-rich signals to be utilised in therapies including Intracardiac Echocardiogram, Ultrasound Endoscopy and Intervascular Ultrasound (IVUS). Japanese wire and cable pioneers Junkosha have launched a new product range, in what is billed as an innovation that will enable a new generation of small, flexible and intelligent catheters to effectively push back the boundaries of current medical procedures.
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