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.
In this paper, a fully integrated active reflector transponder for the localization and quick evacuation of passengers in the sea in case that passengers are overboard is presented. The backscatter tag is based on a cross-coupled oscillator topology using the switched injection-locked oscillator (SILO) principle and is implemented in a frequency modulated continuous wave (FMCW) radar. Furthermore,...
In this paper, a fully integrated active backscatter transponder based on the switched injection-locked oscillator (SILO) principle for frequency modulated continuous wave (FMCW) radar applications is presented. Furthermore, a novel theory to model the phase sampling behaviour of a SILO, accounting for noisy injection signals, is derived. The presented backscatter tag operates at 34.5 GHz and reaches...
A receiver frontend consisting of a low noise amplifier (LNA) and a quadrature down-conversion mixer is presented which is optimized for large bandwidth and high input dynamic range. The input bandwidth covers several standards such as DAB, DRM+ and DVB-T. A minimum system noise figure of 5dB is achieved. The 1 dB compression point reaches 7dBm and the input-referred IP3 amounts to 15dBm. A dynamic...
The zoom FFT (ZFFT) has been utilized in various digital signal processing systems, it is used when a fine spectral resolution is needed within a small portion of a signal's overall frequency range. It has been implemented in different fields and for different applications. This paper presents an implementation method of the ZFFT approach to estimate the spectral peak in the FMCW radar using a field...
A novel approach for wideband planar baluns is presented, which enables the realization with just two instead of three transmission lines. The analysis of the principle of operation and a suitable design procedure are described. Measurement results of test structures are compared to EM simulations. Two variants of this balun were designed for a center frequency of 35 GHz. Measurements show an absolute...
For precise ranging in dense indoor RFID applications, a large absolute bandwidth is required for effective multipath suppression. Since the bandwidth of UHF systems is severely restricted, we propose mm-wave tags combined with high volume data storage and high speed data transfer (≫10 MBit/s) as an attractive alternative - in short range (1–10 m) augmented reality and multimedia applications, for...
<?Pub Dtl?>In this paper, a fully integrated active backscatter transponder based on the switched injection-locked oscillator (SILO) principle for frequency-modulated continuous-wave radar applications is presented. Furthermore, a method to characterize a SILO amplifier is extended and utilized to measure the system parameters of the presented backscatter tag that operates at 34.45 GHz. It is...
This work describes a demonstration platform for frequency-modulated continuous wave (FMCW) based ranging systems operating in the 5.8 GHz ISM band. The goal is to gain insight into system behavior and determine critical system parts prior to integration on chip. The versatility and configurability of the presented system allows testing different synchronization and ranging principles. A synchronization...
This paper presents an active pulsed reflector for a FMCW radar system based on the switched injection-locked oscillator principle at 30 GHz. The theory of the active backscatter transponder is extended and system investigations with respect to the impact of phase sampling noise were performed. The circuit has been integrated in a 0.25 µm SiGe BiCMOS technology. On-wafer measurements showed a phase...
This paper analyses localization schemes in relation to accuracy, hardware requirements, and medium access. Measurements principles and system topologies are investigated. The front-end design of a frequency modulated continuous wave (FMCW)-based local positioning is presented. The transceiver operates in the 5.8 GHz ISM band and is able to transmit frequency chirps at 14 dBm output power. The receiver...
Local positioning systems (LPS) are not only of increasing interest for industrial and commercial applications, but are also required for crisis management to keep track of first responders at all times, both for security and for logistic reasons. In such systems, frequency-modulated continuous wave (FMCW) radar is widely used. However, the properties of the radio channel for the application in crisis...
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.