Topic
Dielectric resonator antenna
About: Dielectric resonator antenna is a research topic. Over the lifetime, 8199 publications have been published within this topic receiving 111090 citations. The topic is also known as: DRA.
Papers published on a yearly basis
Papers
More filters
Patent•
10 May 2002TL;DR: In this article, a transmission/reception switch such that the switch can be a monolithic element, the breakdown power is good, the size is small, and the cost is low is provided.
Abstract: A transmission band filter (110) having a series of elements (111, 113, 115) each composed of a film bulk acoustic resonator and grounded shunt elements (112, 114) is connected between a transmission port (102) and an antenna port (106). A reception band filter (130) having a series of elements (131, 133, 135) each composed of a film bulk acoustic resonator and grounded shunt elements (132, 134, 136) is connected between a reception port (104) and the antenna port (106). A film bulk acoustic resonator (150) for adjustment is connected between the antenna port (106) and the ground. The resonance frequency of the adjusting film bulk acoustic resonator (150) lies between the upper limit frequency of the transmission frequency pass band of the transmission band filter (110) and the lower limit frequency of the reception frequency pass band of the reception band filter (130). Therefore a transmission/reception switch such that the switch can be a monolithic element, the breakdown power is good, the size is small, and the cost is low is provided.
34 citations
Patent•
22 Mar 1996TL;DR: In this paper, a high Q multi-layer ceramic transmission line resonator (100) was proposed for RF applications, which utilizes current manufacturing processes to fabricate an equivalent thick center conductor to effectively increase the Q factor.
Abstract: A high Q multi-layer ceramic transmission line resonator (100) used for RF applications. The resonator (100) includes a plurality of strips (102) which are separated by a ceramic substrate (104). Each of the strips are interconnected using vias (110) passing through the ceramic substrate (104). The invention utilizes current manufacturing processes to fabricate an equivalent thick center conductor to effectively increase the Q factor. This allows for the resonator to be used in miniature RF communication devices utilized in high tier devices such as voltage controlled oscillators (VCOs) or integrated filter circuits.
33 citations
Patent•
14 Dec 1988TL;DR: In this paper, a dielectric notch filter is proposed for attenuating frequencies of relatively narrow bandwidth in comparison to the center frequency of operation, and particularly for attenuated such narrow bandwidths in the ultra-high frequency electromagnetic spectrum.
Abstract: A dielectric notch filter for attenuating frequencies of relatively narrow bandwidth in comparison to the center frequency of operation, and particularly for attenuating such narrow bandwidths in the ultra-high frequency electromagnetic spectrum. The dielectric notch filter comprises a plurality of dielectric notch resonators coupled to a transmission line at slightly less than the quarter wavelength of the center frequency of the attenuation frequency bandwidth so as to minimize interaction between the individual dielectric notch resonators. Each dielectric notch resonator comprises a dielectric resonator, an associated housing and a coupling reactance element which in turn comprises an inductive wire and a variable capacitor so as to null the reactive component of the dielectric resonator, thereby resulting in a highly attenuated resonant frequency having little imaginary component about said center frequency. By use of a plurality of such dielectric notch resonators, a bandwidth of frequencies can be attenuated through coupling of each resonator to the transmission line.
33 citations
TL;DR: Based on the enlarged DRA design, a stacked DRA (sDRA) is proposed to improve the bandwidth from 8.7% to 15% and enhance the realized gain by an average of 1.5 dB.
Abstract: In this communication, a rectangular dielectric resonator antenna (DRA) is integrated with a backed cavity to enlarge the DRA side length by 1.8 times. The backed cavity also reduces the sensitivity of the DRA resonance to the DRA size, resulting in a relaxed fabrication tolerance. Based on the enlarged DRA design, a stacked DRA (sDRA) is proposed to improve the bandwidth from 8.7% to 15% and enhance the realized gain by an average of 1.5 dB. The proposed mechanisms are verified by fabricating a $4\times4$ sDRA array with an enlarged DRA side length of 1.8 mm ( $0.40 {\lambda }$ ), an improved bandwidth of 62.7–73.9 GHz (16.4%), and an enhanced measured gain of up to 17.2 dBi. The enlarged DRA dimension permits a higher DRA operating frequency without reducing the DRA size. The proposed millimeter-wave (mmW) sDRA array provides a wide bandwidth and high-gain solution for 67 GHz unlicensed band communications.
33 citations
TL;DR: In this paper, a dual-band circularly polarized (CP) stacked rectangular dielectric resonator antenna (DRA) was proposed, and three sets of degenerate orthogonal modes in the stacked rectangular DR and the slot modes were utilized to realize dual-bands CP radiation, and the measured 3-dB axial-ratio (AR) bandwidths of the two bands were 9.7% and 20.0% respectively.
Abstract: A wide dual-band circularly polarized (CP) stacked rectangular dielectric resonator antenna (DRA) is presented. The stacked rectangular dielectric resonator (DR) has two layers, and it is excited by an asymmetrical cross-slot. Three sets of degenerate orthogonal modes in the stacked rectangular DR and the slot modes are utilized to realize dual-band CP radiation. It is found that the quasi- ${TE}_{111}$ mode and slot modes are for the lower band, and the quasi- ${TE}_{113}$ and quasi- $ {TE}_{115}$ modes are for the upper band. The proposed antenna was simulated and measured, and the measured results agree well with the simulated ones. The measured 3-dB axial-ratio (AR) bandwidths of the two bands are 9.7% and 20.0%, respectively.
33 citations