Double-balanced mixers are used extensively in transmitters and receivers. For frequencies above 5 GHz the designs are normally realized using strip line and microstrip techniques. This is because distributed element baluns become smaller in size and more attractive for design as the frequency increases. Semiconductor-based mixers are the most compact. However, changing the design is very time consuming and expensive. Therefore, semiconductor mixers are generally targeted for high to super high volume applications. Blue Cell~(TM) low temperature co-fired ceramic (LTCC)-based mixers are small in size and lower in cost, and can be customized to meet various needs. They are easier to customize than semiconductor mixers and are ideal for moderate to high volume applications. A series of Blue Cell LTCC-based mixers has been designed using patent pending techniques. These mixers are offered as standard catalog products.
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