A 5-GHz CMOS wireless LAN receiver front end

Concurrent multiband low-noise amplifiers-theory, design, and applications

“…The notch due to the LNA is about 40 dB deeper than the peaks, which directly translates to the same amount of improvement in image rejection. Due to the large difference between the notch and pass-band frequencies, no elaborate tracking loops such as those proposed in [59] are necessary to obtain extra image rejection. The single-ended nature of the LNA makes external Baluns unnecessary.…”

Wireless Receiver Architectures Towards 5G: Where Are We?

“…In the 1990s and the early 2000s, the superheterodyne receiver was the most commonly used architecture for mobile communications [3], [4], [7], [25], [35], the direct conversion topology being limited to e.g. pager receivers [5].…”

“…Calibration techniques can be used to improve the image rejection in both the Hartley and Weaver architectures [12]. In addition, an automatically tuned PLLbased filtering concept was proposed in order to obtain more attenuation of the image signal [35]. Alternatively, a tunable image-reject notch filtering approach was proposed [36].…”

Integrated Circuit Ceramic Ball Grid Array Package Antenna

“…For example, the single-chip and single-package radios have been demonstrated recently for Bluetooth and HIPERLAN applications. In the single-chip radios, the zero-or low-IF architectures are utilized and all components are integrated on a single silicon chip in submicron CMOS technology [1], [2]; while in the single-package radios, the heterodyne or super-heterodyne architectures are employed and several bare chips optimized in different semiconductor technologies are squeezed into a single package [3], [4].…”