In this paper, we discuss how a holographic interference technique can be applied in the experimental determination of the phase centers of non-standard horn antennas in the millimeter-waveband. The phase center is the point inside the horn from which the radiation appears to emanate when viewed...
Part II: Array of phase-monitored antennas. Int J Hyperthermia 1993;9:445-454. [PubMed: 8515146]Camart JC, Dubois L, Fabre JJ, Vanloot D, Chive M. 915 MHz microwave interstitial hyperthermia. Part II: Array of phase- monitored antennas. Int J Hyperthermia 1993;9:445-54....
Digital phase shifters are used for the computer control of beam scanning in phased-array antenna systems [24]. At microwave frequencies, digital phase shifters can be designed using: 1) ferromagnetic materials for obtaining switchable phase shift, 2) semiconductor, or 3) MEMS devices. In ...
Other systems, such as microwave radio systems, usually have directional receive and transmit antennas facing each other from building roofs or mountaintops. Consequently, the interfering noise level is usually very low, and complex constellations such as 64-QAM or 256-QAM can be used. This ...
"Direction of Arrival Estimation of Broadband Microwave Signals in Phased Array Antennas Using Photonic Techniques," Journal of Lightwave Technology, Vol. 24, No. 7, July 2006, pp. 2741-2745. Merkel et al, "Multi-Gigahertz Radar Range Processing of Baseband and RF Carrier Modulated Signals in...
dB Control Launches High-Power, Ultra-Low Phase Noise Microwave Home News Forums Need Help Finding Solutions Multimedia Magazines Search: Sign In Free Newsletter Articles Resource Centers Amplifier Military & Defense Test & Measurement Find RF Solutions Amplifiers Antennas Attenuators Cables/Assemblies ...
The transmission of synchronization signals between two synchronization antennas is analyzed, followed by the theoretical error analysis. Then, the processing of separating the echo signal and synchronization signal is described in detail. The simulation experiments are performed. The accuracy of phase ...
A complete thorough characterization of these particles is mentioned in [24]. Their applications for reconfigurable antennas, RF switches and microwave filters are explored in [25,26,27]. This proposed research work explores the novel design of combining a unit cell conventional metamaterial printed...
12.The phase-conjugate antenna system of claim 11, wherein the receive and transmit antenna elements are within the enclosure. 13.The phase-conjugate antenna system of claim 11, wherein for each pair of receive and transmit antenna elements, a midpoint between the phase centers of those receiv...
Multi-moded horn antennas can be used as high efficiency feeds for bolometers when diffraction limited resolution is not required. For example, such horns are proposed for the PLANCK Surveyor, a satellite telescope due to be launched in 2007 to make definite measurements of the Cosmic Microwave ...