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The concurrent transmission and reception of the signals in different frequency bands are required for the mobile terminals in IMT-Advanced systems to support spectrum aggregation systems. The authors have proposed a new transmitter architecture that enables the concurrent transmission of two separate frequency bands. The architecture is based on delta-sigma (ΔΣ) modulation, which converts a non-constant...
Silicon offers a new set of possibilities and challenges for RF, microwave, and millimeter-wave applications. While the high cutoff frequencies of the SiGe heterojunction bipolar transistors and the ever-shrinking feature sizes of MOSFETs hold a lot of promise, new design techniques need to be devised to deal with the realities of these technologies, such as low breakdown voltages, lossy substrates,...
We demonstrate a 36 times 12 times 0.9mm3 sized compact monolithic LTCC SiP transmitter (Tx) for 60GHz-band wireless communication terminal applications. Five GaAs MMICs including mixer, driver amplifier, power amplifier and two of frequency doublers have been integrated onto LTCC multilayer circuit which embeds a stripline BPF and a microstrip patch antenna. A novel CPW-to-stripline transition has...
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