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Frequency-modulated continuous-wave (FMCW) radars can provide high resolution and superior sensitivity for wireless sensing [1–3]. Radar signals, whose frequency increases or decreases linearly with time, are transmitted via an antenna, reflected from an object, and then received through an antenna after a time delay. Therefore, the frequency difference between the transmitted and received signals...
The RF front-end complexity in 4G multimode multiband cellular radios has increased dramatically, requiring integration of PAs, filters and switches in a single module to reduce the RF footprint. This paper presents a fully integrated multimode TDD transmit front-end module (TXM) supporting GSM/EDGE/TD-SCDMA/TD-LTE in multiple bands. The TXM is implemented with three die on a 2-layer laminate LGA...
The demand of higher data-rates for mobile communication has driven the LTE standard to adopt methods to increase channel bandwidth by Carrier Aggregation (CA), this is known as LTE-Advanced (LTE-A). Due to regional spectrum allocation, these carriers can be inter-band, or intra-band with contiguous (CCA) or non-contiguous (NCCA) channels. The band combinations create a major challenge for an LTE-A...
Multimode cellular RFICs need high dynamic range in order to simultaneously satisfy the high linearity requirements of LTE and the low-noise performance of 2G. Traditionally, SAW filters are employed to relax the noise-linearity trade-off at the cost of higher BOM. In a highly competitive market, mobile devices need to support >35 LTE bands, a number which is expected to rise further in the future,...
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