[PDF] Top 20 An active frequency-tuned beam-scanning leaky-wave antenna

... THE ACTIVE LEAKY-WAVE ANTENNA Figure 1 shows the microstrip realization of the active leaky- wave antenna ...The leaky-wave antenna is ... See full document

... Furthermore, reflected wave due to the open end of each leaky-wave antenna element has been suppressed by the symmetric configuration of this antenna array and the antenna efficiency inc[r] ... See full document

... of an -band active two-beam scanning leaky- wave antenna is presented as ...of an HEMT VCO, a matching circuit and a microstrip two-terminal feeding ... See full document

... An asymmetric feeding X-band active leaky-wave antennas is developed, to excite the first high order mode of the microstrip leaky wave antenna.. One is the asymmetric [r] ... See full document

... The frequency tuning and effective radiation power (EIRP) variation of Gunn VCO leaky wave antenna as a function of varactor bias voltage... The H-plane radiation pattern of the asymmetr[r] ... See full document

... two-dimensional beam scanning using a phase-shifterless linear active leaky-wave antenna ...1 leaky-wave antenna array shows that the main beam can be ... See full document

... broadside coupling iroquency conlrol frequency control 2.3 Azimuth scan. A sc;intiing-array di:igr:im is showti in Fig[r] ... See full document

... A novel two-dimensional electronic beam scanning technique using a linear leaky-wave antenna array with coupled oscillators is introduced, eliminating the need for phase shifte[r] ... See full document

... ABSTRACT: An X-band four-element linear microstrip leaky-wa ¨ e ( ) antenna LWA array with a dual-beam radiation pattern and two- dimensional scanning capability is de ¨ ...the ... See full document

... describes an -band 4 1 aper- ture-coupled series-fed electronically steerable microstrip leaky-wave antenna (LWA) array design, which has dual-beam radiation pattern and two-dimensional ... See full document

... asymmetrically scanning, resistive up- converter. I. I NTRODUCTION M ICROSTRIP leaky-wave antennas [1]–[4] have the advantages of narrow beamwidth, small size, easy fabrication, easy matching, ... See full document

... A frequency-scanning leaky-wa ¨ e antenna with an aper- ture-coupled feeding structure is ...this antenna. The measured H-plane main beam is a pencil beam, and is ... See full document

... the antenna-scannable angle is strongly depen- dent on the operating frequency range of the active sources, and the microwave and millimeter-wave solid-state devices become expensive as the ... See full document

... ABSTRACT: An acti ¨ e-integrated two-terminal leaky-wa ¨ e antenna de- sign is demonstrated in this ...paper. An X-band two-terminal-fed mi- crostrip leaky-wa ¨ e antenna and ... See full document

... Recently, leaky-wave antennas have become popular and there is growing interest in the active-integrated leaky-wave antennas as frequency scanning ...narrow beam ... See full document

... main beam position depends on its operating ...a frequency-scanning w x ...the leaky-wave antenna. In this letter, an attempt is made to integrate an active ... See full document

... fast wave re- gion, which are qualitatively matched with the dispersion char- acteristic analysis shown in ...in an anechoic chamber using an HP8530A vector network ...main beam of which can ... See full document

... paper, an alternative structure with two-directional space beam-scanning capability is ...whose scanning beams are radiated above the ground plane. The other beam-scanning ... See full document

... two leaky-wave regions of similar radiation characteristics like the microstrip 1 ...is leaky between ...second leaky region of the EME ...two leaky regions also validate the dispersion ... See full document

... this antenna can be influenced to compact the width of conventional ...short leaky-wave antenna is embedded with two rectangular ...the scanning angle of the measured main beam ... See full document