The study proposes a novel Approach of Circular Microstrip Patch Antenna for Multi-Band. Proposed Dimension is (40×30×1.6)mm^3 on the FR-4, Which has ?_r equals(4.3) and Loss tangent (0.002). Both Patches Grounds are Copper Material With Thickness (0.035 mm) Five Bands Achieved, At Resonance Frequencies (9.658 GHz), (11.68 (16.054 (21.28 (29.704 GHz) Respectively. This Operates In Wireless Appl...

Rydberg atoms can serve as an atomic radio frequency receiver for digital and analog information transmission. In this paper, a ladder-type electromagnetically induced transparency system is prepared in room temperature cesium vapor cell. Microwave electric fields the Ku band at of 12.52 GHz Ka 39.80 are used two-channel communication carriers to demonstrate concurrent Analog communications dem...

a digital look-up table adaptive predistortion technique using a six-port receiver for power amplifier linearization is presented. the system is designed in ka-band for a dvb-s2 satellite link. we use a six-port receiver at the linearizationloop in place of classic heterodyne receivers. the six-port receiver is implemented by the use of passive microwavecircuits and detector diodes. this approa...

Numerous studies conducted as part of the Tropical Rainfall Measurement Mission (TRMM) program have demonstrated the benefits of space-borne precipitation measurements. The NASA Global Precipitation Mission (GPM) is an outgrowth of TRMM that will provide improved precipitation measurements and extend those measurements to higher latitudes. GPM satellite will carry a microwave imager coupled wit...

Hideo YAMANAKA Professor Department of Civil and Environment Engineering University of Tokushima 2-1, Minami-Josan-Jima, Tokushima, 770-8506 Japan Fax: +81-88-656-7579 E-mail: [email protected] Tetsuo MITANI Associate Professor Department of Economics and Information University of Marketing and Distribution Sciences 3-1 Gakuen-Nishi-Machi, Nishi-Ku, Kobe 651-2188, Japan Fax:+81-78-7...

Along with the deployment of low earth orbit (LEO) satellite constellations for global Internet services, Ku, Ka or V band microwave signals will be available from space anywhere on Earth. Utilizing signals, a new approach to positioning flying objects passively is proposed, and diffraction model characterize impact object intensity received presented. A linear Minimum Mean Squared Error (MMSE)...

The new Ka-band communications services require highly linear, high power amplifiers (HPAs). Traveling wave tube amplifiers (TWTAs) offer the best millimeter wave HPA performance in terms of power and efficiency, but are inferior to solid state power amplifiers (SSPAs) in linearity. This paper discusses techniques for improving millimeter wave HPA linearity. The significance and methods for eva...

This paper describes the Twin-Otter SAR Testbed developed at Sandia National Laboratories. This SAR is a flexible, adaptable testbed capable of operation on four frequency bands: Ka, Ku, X, and VHF/UHF bands. The SAR features real-time image formation at fine resolution in spotlight and stripmap modes. High-quality images are formed in real time using the overlapped subaperture (OSA) image-form...