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A 22.8 GHz analog frequency divide-by-3 circuit is presented based on an injection locked oscillator. Substrate integrated waveguide (SIW) technology is used to implement the input and output sections of the frequency divider circuit. The input SIW section at the gate of the active device permits the introduction of the injection signal at the third harmonic frequency of the oscillator, while the...
This paper presents the design of a dual-band power amplifier operating at 2.4 GHz and 3.35 GHz. The proposed topology is based on the use of composite right/left-handed unit cells. A composite right/left-handed cell exhibits a dualband frequency response at an arbitrary pair of frequencies because of its phase characteristics. A power amplifier based on an enhancement mode pseudomorphic HEMT transistor...
This paper presents a description of a data-base structure that can be used for electromagnetic energy harvesting information by gather energy footprints and relate them with GPS information. The paper describes the information system architecture that is behind the data-base structure and it is expected that it will become a source of information around the world on energy harvesting. Moreover an...
A reconfigurable reflectarray based on the use of voltage controlled oscillators is presented. Each of the cells in the reflectarray is formed by an active oscillator antenna consisting of a radiating element aperture coupled to a voltage-controlled oscillator (VCO). The various cells due to radiation coupling form a coupled oscillator array. Beam-steering as well as beam forming can be achieved by...
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