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System-on-Package (SOP) is presently the most effective method for realizing the miniaturization of wireless front-end applications. Band pass filter is one of the most important components in the SOP. In this paper, a 5-pole band pass cavity filter consisting of via walls was designed as a system-on-package solution for RF front-end modules at 34GHz, adopting low-temperature co-fired ceramics (LTCC)...
This paper discusses possibilities of tunable radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) filters. First, configuration of RF front-end in current wireless communication systems is surveyed, and research trends of the flexible RF front-end and software defined radio (SDR) are discussed. Second, various RF tunable filters are introduced, and we discuss how high performances are expected...
We propose and demonstrate a 50 GHz opto-electronic dual-loop oscillator with low phase noise of -95 dBc/Hz at 10 kHz offset from a 50 GHz carrier and a frequency tunability of more than 100 MHz.
This paper presents different acoustic technologies available for innovative wireless designs. Solidly mounted BAW resonators, coupled resonator filters, Lamb wave devices and guided wave components are described. The advantages of these technologies are highlighted and their performances are compared. All these technologies can be used to design highly integrated wireless architectures.
A 2.4 GHz 4th order BP ΔΣ ADC is presented. The feedforward topology uses Gm-LC resonators that can be calibrated in frequency. The quantizer is split in 6 interleaved comparators to relax speed. Clocked at 6.1 GHz, it achieves a DR of 43 dB in 80 MHz consuming 52.8 mW. Implemented in 40 nm CMOS, it achieves a FoM of 3.6 pJ/conv. step, which is to date the lowest published value for RF BP ADCs.
This paper presents a reconfigurable up-converter with image rejection. It consists of an FET mixer, a VCO, a lowpass filter and a tunable bandpass filter. It can shift a given input IF signal to any desired RF frequency within a wide frequency range while maintaining high image rejection level. With the change of VCO output frequency, the image, LO and harmonic frequencies also shift and maybe overlap...
In order to make more efficient use of radio spectrum and reduce RF circuit size of future mobile communication terminals, reconfigurable RF circuits will be necessary that can flexibly change larger number of frequency bands. This paper presents a two-stage two-bit reconfigurable bandpass filter employing two-bit variable-length transmission line resonator. The resonator consists of a λ/4 resonant-mode...
We present a tunable multiple-channel microring resonator spectral shaper for radiofrequency arbitrary waveform generation (RFAWG). Sixteen resonators are cascaded to create various RF waveforms.
A double-ended tuning fork (DETF) fabricated in a 0.35 um commercial CMOS technology is presented. Resonator performance for the application of this device in a RF front-end is measured using electrical test. DEFT offers a higher isolation between ports than clamped -clamped beams and the possibility to create a band-pass for frequency filtering or mixing using a single resonator. Discrepancies between...
In this paper, fully embedded 2.4 GHz WLAN band pass filter (BPF) is investigated into a multi-layered organic package substrate using high Q spiral stacked inductors and high Dk MIM capacitors for low cost RF system on package (SOP) applications. The proposed 2.4 GHz WLAN BPF is designed by modifying Chebyshev second order filter circuit topology. It is comprised of two parallel LC resonators for...
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