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This paper introduces the research results of the GaAs ultra-wideband MMIC control circuit technology, including: ultra-wideband digital phase shifter, digital attenuator, absorption type switch, reflective switch and vector modulator. The research results of three-dimensional integrated circuit technology based on LTCC are also proposed in this paper, including a variety of LTCC bandpass filters,...
An ultra-wideband (2-18GHz) 6-bit MMIC digital attenuator has been designed. The attenuator has been fabricated with 0.5μm GaAs PHEMT process. Low insertion phase shift has been achieved over the main attenuation states. On-wafer measurement results of the developed MMIC chips in the 2-18GHz band show that the 6-bit MMIC digital attenuator has 31.5dB dynamic range stepped by 0.5dB; attenuation accuracy:...
This letter outlines the design and manufacture of a miniaturized bandpass filter realized by low-temperature cofired ceramic (LTCC) technology for bluetooth applications. The bandpass filter with a central frequency of 2450 MHz and a 100 MHz passband is designed as a three-dimensional (3-D) structure based on lumped components. Experimental measurements were compared with modeling. The insertion...
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