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This paper examines a two-dimensional (2-D) parallel-plate parabolic reflecting structure to implement the Beam forming network (BFN) for the directional beam radiation of phased array of antennas, which is realized in the substrate integrated waveguide (SIW) structure. To further reduce the intrinsic insertion loss of dielectric substrate, the air cavity technique is utilized for electromagnetic...
Recently, paper has been mentioned in many research studies [1-4] as a good choice of a substrate material for flexible electronics. In this paper, the E4D paper has been characterized by the cavity perturbation method, then a monopole antenna structure, called “Sapin” by its shape, has been designed on it to cover a very wide frequency range including two WLAN bands. The proposed antenna is rather...
In this paper an X-band parallel broad-side coupled microstrip coupler is proposed for the RF module's built-in test (BIT) integrated with the receiver circuit on the same single-layer substrate. The coupler with a coupling coefficient of 10 dB is designed on a single-layer thin substrate with the features of small size, simple structure, and easy integration. The thin substrates, e.g. Rogers 5880...
Millimeter wave identification (MMID) enables new improvement, such as the high number of different codes that can be ‘written’ on a tag, location sensing through narrow-beam antennas etc. In this paper novel compact chipless MMID tag is presented. The tag consists of a slot etched on the top of circular Substrate Integrated Waveguide (SIW) cavity. Reader concept based on frequency domain measurement...
Two SIW bandpass filters (BPFs) are presented using rectangular cavities and loaded posts for 5.8GHz WLAN system using rectangular cavity and loaded posts. Except that both of them use two rectangular cavities to create a passband, they are different in setting the feed-line locations. In design, two loaded posts are introduced as inductive coupling elements to restrain the fundamental resonant mode...
In this paper, a dual-frequency substrate integrated waveguide (SIW) cavity backed slot antenna has been presented. The unique slot structure includes a pair of slot stubs connected at the center of the radiating slot which helps to create an additional hybrid mode resonance at the higher frequency end. As a result, the antenna resonates at two different frequencies 8.96 GHz and 15.84 GHz with a bandwidth...
The method of the split cylinder resonator cavity (SCR) is used to characterize accurately and simultaneously in one temperature cycle, dimensional and electrical characteristics of the cavity and the electromagnetic properties of a dielectric material. To do this several modes are used, some to control the cavity and others to control the sample.
In this paper, an X-band cross-coupled substrate integrated waveguide (SIW) filter with sharp sideband performance is proposed. The negative coupling is implemented by 201 TE -mode response in the fourth oversized cavity, which is combined with positive coupling to generate transmission zeros(TZs) for improving the sideband performance.The filter with a passband of 11.5GHz∼12.5GHz is fabricated on...
In this paper, a low phase-noise oscillator using a complementary split ring resonator (CSRR) based on a substrate integrated waveguide (SIW) has been proposed and developed for microwave applications. The substrate integrated concept is applied to implement an oscillator circuit. The unloaded Q factor of the SIW cavity is increased by loading a complementary split ring resonator (CSRR). A detailed...
Fabry-Perot cavity (FPC) antennas are fully integrated onto a printed circuit board. The antenna consists of a partially reflective sheet formed by finite-size periodic array of metal patches printed on a grounded dielectric substrate and a feeding microstrip patch embedded in the substrate. The field distribution reveals the basic features of operating modes and the distribution of power loss. Simulated...
The paper presents the design and development of a low cost chipless RFID system for secure near field data transfer. This system is ideal for use in credit cards and similar identification cards which are based on "data transfer by contact" which at present uses the conventional using integrated circuits (IC) or magnetic strips. The system consists of the design of a compatible low cost...
This paper proposes a method to measure permittivity anisotropy in the plane of dielectric laminate substrates by utilizing orthogonality of TE111 mode in a circular cavity resonator. For cyclo-olefin polymer (COP), liquid crystal polymer (LCP) and glass cloth PTFE substrates, the permittivity anisotropy in the plane is measured by this method. As a result, usefulness of this method is verified by...
Active antenna oscillator and coupled oscillator topologies are proposed, whose elements are cavity backed antenna oscillators implemented in substrate integrated waveguide (SIW) technology. Compact single substrate implementations are demonstrated. The cavity backed topology allows one to resolve potential heat dissipation problems, and provides a design parameter to control coupling among the oscillator...
We use the split-cylinder cavity's TE111 resonant mode, in addition to the higher-order TE0np modes, to extend the frequency range over which one can nondestructively measure the permittivity of dielectric substrates. In addition to the frequency range of the split-cylinder resonator, we also demonstrate that measurements performed with the TE111 mode allow us to calculate the frequency of the higher-order...
In this paper, the substrate integrated waveguide (SIW) cavity resonator is proposed. The coupling between SIW cavity and microstrip line is achieved by the electric field at the vertical center plane along the propagation direction. Unlike the conventional cavity coupling structure that shows absorption characteristics at the resonant frequency, it can be easily integrated into planar form. The cavity...
A novel compact coupled planar resonator (CCPR) based VCO (voltage controlled oscillator) using mode-coupling technique was developed in response to expensive high Ceramic and SAW resonators based signal source for wireless communications. One of the problems related to the conventional Ceramic/SAW based resonators (with high Q and low phase noise) is the challenge for integration in IC form. Instead...
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