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microstrip

Constantinos A. Valagiannopoulos, Nikolaos L. Tsitsas · 2016

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Broadband Microstrip-to-Microstrip Vertical Transition Design

Ziwen Tao, Jian Zhu, Tongsheng Zuo et al. · IEEE Microwave and Wireless Components Letters · 2016

This letter presents a broadband microstrip-to-microstrip vertical transition. Basically, the transition is based on broadside coupling between the upper and lower microstrip patches through a wide slot etched on the ground plane. In order to enhance bandwidth of the transition, a patch introducing a half wavelength resonance into the passband is added on the ground plane. A demonstrator transition has been designed, fabricated and measured. Results show that a frequency range of 2.8 to 8.5 GHz (referred to return loss of 10 dB) is obtained.

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MICROSTRIP FILTERS

Thomas H. Lee · Cambridge University Press eBooks · 2004

Modern wireless communications hardware is underpinned by RF and microwave design techniques. This insightful book contains a wealth of circuit layouts, design tips, and practical measurement techniques for building and testing practical gigahertz systems. The book covers everything you need to know to design, build, and test a high-frequency circuit. Microstrip components are discussed, including tricks for extracting good performance from cheap materials. Connectors and cables are also described, as are discrete passive components, antennas, low-noise amplifiers, oscillators, and frequency synthesizers. Practical measurement techniques are presented in detail, including the use of network analyzers, sampling oscilloscopes, spectrum analyzers, and noise figure meters. Throughout the focus is practical, and many worked examples and design projects are included. There is also a CD-ROM that contains a variety of design and analysis programs. The book is packed with indispensable information for students taking courses on RF or microwave circuits and for practising engineers.

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Microstrip Circuits

Terry C. Edwards · Encyclopedia of RF and Microwave Engineering · 2005

Abstract The general geometry of microstrip materials and techniques for its manufacture are discussed in the article, where the basic advantages are also described in comparison with other types of MIC and MMIC transmission lines.

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Microstrip Circuits

Gardiol, F. E. · Infoscience (Ecole Polytechnique Fédérale de Lausanne) · 1994

LEMA

Cited by 6Open access

Microstrip loss.

Arikonmaz, Remzi · Calhoun: The Naval Postgraduate School Institutional Archive (Naval Postgraduate School) · 1975

This thesis presents a frequency dependent analysis of micro-strip loss. Spectral domain theory is employed to develop expressions for both dielectric and conductor loss in a form suitable for programming on a digital computer. Computational results are presented and compared with those of other investigators.

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Microstrip Antennas

Chatterjee, R, Ganesan, NS · NOT FOUND REPOSITORY (Indian Institute of Science Bangalore) · 1979

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microstrip, n.

Oxford University Press eBooks · 2023

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Microstrip Antennas

Ankan Bhattacharya · 2023

This chapter primarily focusses on the basic overview of microstrip antennas, including theory, principles and a review of the literature. Devices used for wireless communication demand compact, wideband or multiband or, in some cases, frequency reconfigurable microstrip antennas for microwave frequency transmission and reception. In this context, low-profile, slotted antennas with improved frequency response characteristics play a significant role in wireless transmissions, consuming a comparatively smaller area, thereby helping to reduce the size of the device. Here, we have reviewed several compact and low-profile antennas for wideband, ultra-wideband (UWB) and super-wideband (SWB) applications. Several slotted geometries, fractal shapes, etc., to achieve efficient frequency response characteristics starting from simple microstrip patches and monopoles to printed multiple-input-multiple-output (MIMO) configurations with UWB responses have been studied. Finally, we explain the design techniques of extremely wideband to SWB antennas in MIMO configurations and elaborate on the applicability of these diverse antennas in wireless communications.

Cited by 1

Microstrip Circuits

Terry C. Edwards · Encyclopedia of RF and Microwave Engineering · 2005

Abstract The general geometry of microstrip materials and techniques for its manufacture are discussed in the article, where the basic advantages are also described in comparison with other types of MIC and MMIC transmission lines.

Cited by 0

Microstrip Antennas

H. How · Encyclopedia of RF and Microwave Engineering · 2005

Abstract This article introduces two calculational methods capable of describing quantitatively the antenna performance. The first method, called resonant cavity model , is less rigorous but nevertheless has the advantage of being more analytical and, hence, it can be applied with ease. The cavity model is considered inappropriate for a microstrip structure showing a thick substrate, or if the dielectric constant of the substrate is large, because under these conditions excitation of surface waves is significant. The second calculational method concerns the Green function analysis. A Green function is defined as the solution of a differential/integral equation under a point source excitation satisfying homogeneous boundary conditions. By using the dyadic Green's functions, the general field solution in a stratified structure excited by external current sources can then be formulated in terms of an integral equation, which is subsequently solved by applying the numerical Galerkin method. This article outlines procedures to calculate the engineering parameters of a microstrip antenna of an arbitrary geometry, and it illustrates calculational results on circular microstrip antennas, showing plots in radiation frequencies, bandwidths, far‐field patterns, input impedances, effects in feeder‐line positions, and interference between antennas. The dyadic Green's functions involving anisotropic/gyromagnetic materials are also introduced, and the transfer matrix technique is explained. A transfer matrix translates the tangential components of the electromagnetic field over one layer of a stratified structure satisfying the boundary conditions therein. Recent developments on printed circuit antennas are reviewed, including the important broadband techniques employing stacked parasitic elements to achieve high gain and low cross‐polarization level. Fractal antennas involving a patch geometry exhibiting a fractional dimension are then introduced.

Cited by 2

Microstrip Antennas

Amit A, Neelam Phatak, Ankita R. Jain et al. · 2015

The broadband microstrip antenna is realized by fabricating the patch on lower dielectric constant thicker substrate followed by using proximity feeding technique. The proximity feeding technique realizes broader bandwidth for substrate thickness more than 0.060. In this paper, proximity fed ETMSA is discussed. By placing the shorting plate along the zero field line at the fundamental mode of the patch, proximity fed compact shorted 600 sectoral MSA is proposed. It gives bandwidth of nearly 550 MHz at center frequency of nearly 1000 MHz. It shows radiation pattern with maximum in the end-fire direction and gain of more than 5 dBi over the bandwidth. Further by using symmetry of 600 sectoral patch, a compact half shorted 600 sectoral microstrip antenna is proposed. It gives simulated and measured bandwidth of 220 MHz with radiation pattern having maximum in end-fire direction and gain of more than 6 dBi over the entire VSWR BW.

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Microstrip Lines

Zhewang Ma, Eikichi Yamashita, K. Atsuki · Encyclopedia of RF and Microwave Engineering · 2005

Abstract A microstrip line is a type of open planar transmission line that consists of a dielectric substrate medium with a ground plane on the lower side and a conducting strip on the upper side. Microstrip line is now one of the most widely used transmission lines for MICs. Active devices (diodes and transistors), lumped circuit elements (capacitors, resistors, inductors), dielectric resonators, and antennas can be easily incorporated into the circuit. Compared with the traditional bulky and heavy metallic waveguides and coaxial lines, the planar microstrip structures are smallsize, lightweight, easy for mass production, and inexpensive.

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Microstrip dipoles

L.P.B. Katehi, David R. Jackson, N.G. Alexopoulos · Institution of Engineering and Technology eBooks · 1989

Microstrip dipoles have been studied extensively during the last 20 years. They are planar elements which consist of a pair of collinear thin-strip conductors printed on the surface of a dielectric slab. They resemble the free-space cylindrical dipoles in the sense that radiation results from a harmonically varying dipole moment. Microstrip dipoles are attractive elements owing to their desirable properties such as simplicity, small size and linear polarisation.

Cited by 3

Microstrip Loss.

Arikonmaz,Remzi · Defense Technical Information Center (DTIC) · 1975

The thesis presents a frequency dependent analysis of microstrip loss. Spectral domain theory is employed to develop expressions for both dielectric and conductor loss in a form suitable for programming on a digital computer. Computational results are presented and compared with those of other investigators.

Cited by 0

Microstrip Grafting

Patrick Frechet · International Journal of Cosmetic Surgery and Aesthetic Dermatology · 2001

The author presents his personal approach when performing a hair transplant session. As a solo practitioner performing the entire procedure, the author emphasizes the interest of standardized grafting with the use of the only undetectable minigraft of which he is aware. This surgical procedure combines several criteria: (1) The use of the microstrip grafts. These flat grafts are all of the same size. The microstrip grafts average 0.66 × 3 mm. The key role of the width of the graft in terms of aesthetic will be detailed. (2) All the grafts are cut the same way in one motion, to reduce minimize handling. (3) All slits are made with the same size instruments, which mimics the shape of the grafts. This instrument uses a "cutting-instant dilating" device to make the insertion easy and gentle. (4) Regular spacing between slits averaging <2-mm distance (12 microstrip grafts average/cm2 or 52 hairs/cm2). (5) Planting also is standardized with a cm distance move, forward and backward, of the wrist and fingers from the moment the graft is grasped until its placement into the slit. Two sessions minimum must be planned for this technique, usually 6 weeks apart. As a result, the surgery is meant to be fast (700 grafts average performed in 3 hours or less by one surgeon alone without assistants) and the aesthetic result meant to be highly aesthetic without grafts being noticeable.

Cited by 0

Microstrip Transitions

E.L. Holzman · Encyclopedia of RF and Microwave Engineering · 2005

Abstract Microstrip line is a printed microwave transmission line used to interconnect microwave devices on an electronic circuit board. Coaxial and waveguide transmission lines are used to interconnect different electronic circuit boards. Thus, transitions are often required between microstrip and other transmission lines. These transitions must have low loss and be well matched, be easy to fabricate and be mechanically robust. This article surveys many of the most commonly used microstrip transitions.

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Microstrip Antennas

Randy Bancroft · Institution of Engineering and Technology eBooks · 2009

It was known that the resonant length of a rectangular microstrip antenna is approximately one-half wavelength with the effective dielectric constant of the substrate taken into account. Following the introduction of the microstrip antenna, analysis methods were desired to determine the approximate resonant resistance of a basic rectangular microstrip radiator. The earliest useful model introduced to provide approximate values of resistance at the edge of a microstrip antenna is known as the transmission line model, introduced by Munson. The transmission line model provides insight into the simplest microstrip antenna design, but is not complete enough to be useful when more than one resonant mode is present. In the late 1970s Lo et al. developed a model of the rectangular microstrip antenna as a lossy resonant cavity. Microstrip antennas, despite their simple geometry, proved to be very challenging to analyze using exact methods. In the 1980s, the method of moments (MoM) became the first numerical analysis method that was computationally efficient enough so that contemporary computers could provide enough memory and CPU speed to practically analyze microstrip antennas.

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Microstrip Antennas:

Broadband Radiation Patterns, Keith C. Huie, Keith Huie · 2007

The purpose of this thesis is to investigate a novel method to develop broadband microstrip (patch) antennas using substrates containing photonic crystals. Photonic crystals are a class of periodic dielectric, metallic, or composite structures that when introduced to an electromagnetic signal can exhibit a forbidden band of frequencies (or bandgap) in which the incident signal destructively interferes and thus is unable to propagate. It is proposed that such photonic crystals will reduce surface waves and prohibit the formation of substrate modes, which are commonly known inhibitors of patch antenna designs. By reducing or eliminating the effects of these electromagnetic inhibitors with photonic crystals, a broadband response can be obtained from inherently narrowband antennas. In addition, it is also proposed that the behavior of the photonic crystals will lead to a reduction in pattern sidelobes resulting in improvements in radiation pattern front-to-back ratio and overall antenna efficiency.

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Microstrip Lines

Jonghoon Kwon · Elsevier eBooks · 1995

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