The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a low switching-loss Dicke radiometer for W-band passive imaging systems. The equivalent switching loss introduced by the passive single-pole-double-throw (SPDT) switch in the conventional radiometer is significantly reduced by the proposed single-pole-double-throw distributed amplifier (SPDT-DA), which leads to radical improvement on the receiver’s noise performance. The Dicke...
Horizontal probe station poses challenges in determining performance of vertical interposers for test socket. In this paper, a PCB test structure has been proposed for measurement of our designed interposers up to 20 GHz. A new test structure is further proposed and simulated with HFSS to achieve a higher operating frequency. By converting the S-parameters of test structures to T-parameters and splitting...
In this paper, an equivalent three port scalable Inductor model has been developed for symmetric octagonal spiral inductors. The scalable inductor model is able to achieve good match for two port with center-tap connected to ground, three port differential and three port single-ended structures. Adjustable parameters include the number of turns (N), inner diameter (D), width (W) and spacing (S) of...
A programmable discrete-time (DT) filter for wideband wireless receivers is presented. A 2-dimensional DT FIR implementation method reduces the circuit complexity by creating a convolution between charge sharing and charge accumulation filters. The cascaded filter chain down-converts the input over a wide frequency band while limiting the variation in the output sample rate, which is accomplished...
In this design contest, the design methodology leading to a high performance Millimeter-wave amplifier in 0.13 μm SiGe BiCMOS is elaborated. Equivalent circuit models of the utilized cascode shielding structure are developed to assist the amplifier design. Meanwhile, final layouts of the passive connections are verified by 3D electromagnetic simulation in ANSYS HFSS. The implemented amplifier obtained...
A low noise, 250-MHz fifth order 0.1 dB ripple chebyshev Gm-C filter, with a discrete tuning scheme in 0.18-μm CMOS is presented. The tuning circuit employs an amplitude locked loop (ALL) to find the correct tuning word to maintain fc within 250MHz ±5% for VDD variation of 1.8±0.1V, temperature variation of −40°C to 125°C and across process corners. Compared to conventional tuning schemes, proposed...
This paper presents a fully integrated Ku-band low noise block (LNB) front-end receiver with high image suppression capability. It translates the RF-band (10.7–12.75 GHz) to an IF ranging in the L-band (0.95–2.15 GHz). The receiver exhibits a conversion gain of 50 dB, a single-sideband noise figure of 3.8 dB and image suppression level of 40 dB. The integrated receiver draws 80mA from 1.1 V supply...
A receiver front-end for an Ultra-Wide-Band system in 33.6-5-GHz band is reported. An on-chip balun is implemented in between the low noise amplifier and the mixer, which makes the input matching less stringent as compared to the structure of putting the on-chip balun prior to the LNA. Consequently, the low noise amplifier can be single-ended, resulting in low power and low area; while the differential...
In this work, the design of a single ended low-noise amplifier (LNA) dedicated for multi-band orthogonal frequency-division multiplexing (MB-OFDM) Band Group-1 ultra-wideband (UWB) band is described. It achieves a flat gain from 2 to 5 GHz of 17 dB while drawing a current of 15.9 mA from a 1.2 V supply. The circuit has been implemented in 90 -nm CMOS technology and features a minimum noise figure...
Recently, IEEE 802.15.4a has specified a UWB PHY for low-rate commutation with ranging capability for wireless personnel area and sensor network applications. Related work is reported on low-rate energy-efficient UWB radios. A combination of the burst position modulation (BPM) and binary phase shift keying (BPSK) is adopted. With different coding rate, bursts per symbol, and chips per burst, the mean...
A low-power fully integrated wideband low noise amplifier (LNA) and down-conversion mixer are designed for direct sequence-UWB (DS-UWB) RF front-end using 0.18-μm CMOS technology. The LNA is designed to cover the full UWB bandwidth of 7.5GHz. Measurements show this LNA achieves gain of 14 16.5dB, noise figure (NF) of 4.2 - 4.8dB and IIP3 of -8dBm, consuming 6mA of current from a 1.8-V supply. The...
A 2.4-GHz fully-differential RF front-end on 0.18-mum CMOS technology for wireless sensor network (WSN) applications consuming 4.8-mW from a 1.8-V supply is presented. The direct conversion RF-front end comprises of low-noise amplifier (LNA), I/Q direct-conversion mixers, quadrature LO generator and LO buffers. By employing conventional source degenerated LNA, passive mixer, to eliminate flicker noise,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.