In this paper one coplanar wide band bandpass filter (BPF) is designed with end-coupled λ/4 open-stub resonator. This coplanar waveguide (CPW) BPF is designed for passband centre frequency 2.5GHz and 100% fractional bandwidth (FBW) at 3dB. The proposed structure exhibits negligible passband insertion loss, sharp transition from passband to stopband, wide attenuation bandwidth, simple fabricatio...

recently, the s receiver function method has been successfully developed to identify upper mantle interfaces. s receiver functions have the advantage of being free of s-wave multiple reflections and can be more suitable than p receiver function for studying mantle lithosphere. however, because of specific ray geometry of the s-to-p converted waves, the s receiver function method has some techni...

An extremely sensitive all-sky survey will be carried out in the millimetre/submillimetre waveband by the forthcoming ESA mission Planck Surveyor. The main scienti c goal of the mission is to make very accurate measurements of the spatial power spectrum of primordial anisotropies in the cosmic microwave background radiation; however, hundreds of thousands of distant dusty galaxies and quasars w...

Mots-clés : Radiométrie sub-millimétrique Instrumentation Nuage Pluie Mission d’observation de la Terre Different studies and instrument/mission proposals have demonstrated the potential of the passive sub-millimetre–millimetre wave (SMMW) radiometry to provide remote measurements for the characterization of clouds and rain. At these wavelengths radiation received by a satellite over ice clouds...

We report the development and initial implementation of a new rapidspatial-scan millimetre-wave interferometer for plasma density measurements. The fast scan is effected by electronic frequency sweeping of a wide-band (180-280GHz) backward-wave oscillator (BWO) whose output is focussed onto a fixed blazed diffraction grating. The system, which augments the rotating-grating scanned multi-view H-...

This paper describes the waveform analysis for an experimental long-range (10 Km) high-resolution (1x1 m2) Synthetic Aperture Radar (SAR) sensor in the millimetre wave band on board UAV. Motivated by the need to minimize the transmitted power and the volume filled by the sensor, it is proposed the use of a FMICW (Frequency Modulated Interrupted Continuous Wave) radar type. It also is provided a...

The trend for dense deployment in future 5G mobile communication networks makes current wired backhaul infeasible owing to the high cost. Millimetre-wave (mm-wave) communication, a promising technique with the capability of providing a multi-gigabit transmission rate, offers a flexible and cost-effective candidate for 5G backhauling. By exploiting highly directional antennas, it becomes practic...

We report the redshift of an unlensed, highly obscured submillimetre galaxy (SMG), HS1700.850.1, the brightest SMG (S850μm = 19.1 mJy) detected in the James Clerk Maxwell Telescope/Submillimetre Common-user Bolometer Array-2 (JCMT/SCUBA-2) Baryonic Structure Survey, based on the detection of its 12CO line emission. Using the Institute Radio Astronomie Millimetrique Plateau de Bure Interferomete...

Due to the limitation of mobility and cost, it is inappropriate utilize ground base station (GBS) provide service in emergency scenarios or harsh environments. Unmanned aerial vehicle (UAV) considered as a feasible way solve problem. Millimetre wave communication UAV can be used together offer wireless communications flexibly rapidly for target area. However, fuselage jittering energy supply wo...

The phase noise of a 20 GHz picosecond optical pulse train generated by a modulator-based optical frequency comb generator is analysed. The residual timing jitter is 10 fs for Fourier frequencies from 10 Hz to 10 MHz. Photodetection of the optical pulse train provides millimetre-wave signals with similarly low residual jitter at 40, 60, and 80 GHz with applicable powers of 27.5, 210.5, and 213 ...