Proceedings ArticleDOI
An active inverted patch antenna with wideband varactor-tuned capability
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TLDR
In this article, a varactor-tuned inverted circular patch antenna with a power variation of /spl plusmn/1.0 dB over a 13 percent tuning bandwidth was developed.Abstract:
A varactor-tuned inverted circular patch antenna has been developed with a power variation of /spl plusmn/1.0 dB over a 13 percent tuning bandwidth. A simple equivalent circuit has been used to model the active antenna, and the calculated results agree well with the experimental results. The circuit should have many commercial applications in wireless communications, radar, and sensors.read more
Citations
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Proceedings ArticleDOI
An L-band tunable microstrip antenna using multiple varactors
Zhang Jin,Amir Mortazawi +1 more
TL;DR: In this article, a tunable rectangular microstrip antenna at L-band was designed, fabricated and measured, and 8 varactors were placed at the two radiating edges of the antenna.
Journal ArticleDOI
Small size tuneable printed F‐slot antenna for mobile handset applications
TL;DR: In this paper, a tuneable F-slot monopole antenna for mobile handset applications, covering the DCS, PCS, and UMTS frequency bands, is presented and studied.
Journal ArticleDOI
A Frequency-Selecting Technique for Mobile Handset Antennas Based on Capacitance Switching
TL;DR: This paper introduces a mobile switchable antenna for long term evolution (LTE) of the 4th generation (4G), applicable to all mobile service bands, based on capacitance switching among four states based on a new frequency-selecting method.
Frequency agile RF/microwave circuits using BST varactors
TL;DR: Jin et al. as discussed by the authors developed a simple and fast measurement technique to extract BST loss tangent and dielectric constant in a parallel plate BST capacitor and optimized the BST capacitor layout to achieve the best possible quality factor.
Proceedings ArticleDOI
Capacitively loaded compact slot antenna
TL;DR: A compact tuneable F-slot monopole antenna for mobile handset applications, covering the DCS, PCS, and UMTS frequency bands, is presented and studied.
References
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Proceedings ArticleDOI
A frequency agile microstrip antenna
P. Bhartia,I. Bahl +1 more
TL;DR: In this paper, a novel technique for increasing the operational frequency bandwidth of microstrip patch antennas, by using varactor diodes at the radiating edges of the structure, is described.
Journal Article
Japanese domestic satellite communications systems experiments
Journal ArticleDOI
Active radiating element using FET source integrated with microstrip patch antenna
TL;DR: In this article, an FET source was integrated with a microstrip patch antenna to form an active radiating module, which served both as a radiating element and a resonator in the feedback loop for the FET oscillator.
Journal ArticleDOI
Broadband electronically tunable planar active radiating elements and spatial power combiners using notch antennas
TL;DR: In this article, a Gunn device has been integrated with two types of active planar notch antennas, one with a coplanar waveguide (CPW) resonator and the other with a varactor.
Journal ArticleDOI
Active inverted stripline circular patch antennas for spatial power combining
J.A. Navarro,Lu Fan,Kai Chang +2 more
TL;DR: In this paper, an active patch antenna is proposed for spatial power-combining applications, which uses an inverted stripline topology to take advantage of several features such as avoiding drilling through the circuit substrate to insert the diode and the use of air within the resonant cavity to reduce loss.