Topic
Balanced line
About: Balanced line is a research topic. Over the lifetime, 631 publications have been published within this topic receiving 6612 citations.
Papers published on a yearly basis
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Papers
Book•
1 Jan 2006
TL;DR: In this paper, the authors describe mixed-mode scattering parameter techniques and their applications in microwave circuit design, straight from the inventors of the techniques themselves, and present practical techniques that help you more effectively analyze differential and multi-port systems.
Abstract: Gain hands-on understanding of powerful new mixed-mode scattering parameter techniques and their applications in microwave circuit design, straight from the inventors of the techniques themselves. This groundbreaking resource uses the original research and application work in the field to describe mixed-mode S-parameter principles. Supported with over 150 illustrations, the book thoroughly explains practical techniques that help you more effectively analyze differential and multi-port systems; measure and describe multi-port circuit performance; and conduct differential circuit analyses for isolation, crosstalk, stability, noise reduction, and balance. Moreover, the book enables you to achieve greater signal integrity, offering you cutting-edge design guidance on couplers, transformers, baluns, circulators, splitters, filters, and other components. You learn powerful techniques that help you transform a haystack of single-ended microwave data into cogent differential design-oriented results, eliminate errors inherent with single-ended measurements, and speed circuit modeling and design while greatly expanding their regions of stable operation. Balanced circuit design issues such as mode specific matching, CMRR, and mode conversion are also addressed in depth.
318 citations
TL;DR: In this paper, the transmission characteristics of composite right/left-handed transmission lines based on complementary split-rings resonators are discussed, and the necessary conditions to obtain a continuous transition between the left and right-handed bands (balanced case) are pointed out.
Abstract: In this paper, we discuss in detail the transmission characteristics of composite right/left-handed transmission lines based on complementary split-rings resonators. Specifically, the necessary conditions to obtain a continuous transition between the left- and right-handed bands (balanced case) are pointed out. It is found that very wide bands can be obtained by balancing the line. The application of this technique to the design of very wideband and compact filters is illustrated by means of two examples. One of them is based on the hybrid approach, where a microstrip line is loaded with complementary split-rings resonators, series gaps, and grounded stubs; the other one is a bandpass filter, also based on a balanced line, but in this case, by using only complementary split-rings resonators and series gaps (purely resonant-type approach). As will be seen, very small dimensions and good performance are obtained. The proposed filters are useful for ultra-wideband systems.
204 citations
1 Dec 1957
TL;DR: In this article, a form of balun which is useful for matching a balanced circuit to an unbalanced circuit of nearly the same impedance over a wide frequency range is described, which is obtained by the use of a quarterwave transmission line section which is placed inside one of the balanced arms, thereby minimizing the over-all physical length.
Abstract: This paper describes a form of balun which is useful for matching a balanced circuit to an unbalanced circuit of nearly the same impedance over a wide frequency range The bandwidth increase is obtained by the use of a quarter-wave transmission line section which is placed inside one of the balanced arms, thereby minimizing the over-all physical length It is shown that a practical balun of this type, designed to match a 50-ohm unbalanced line to a balanced 70-ohm antenna, has a voltage standing-wave ratio of 14 or better over a frequency band of about 28 to 1 The wide bandwidth, simplicity, and reasonable physical dimensions make the balun particularly useful in connection with the adjustable-length dipole antennas which are generally used for vhf and uhf fieldstrength measurement
167 citations
1 Feb 1960
TL;DR: In this paper, the Tchebycheff tapered balun transformer is proposed to achieve an impedance matching transition from a coaxial line to a balanced two-conductor line.
Abstract: The theory and design of a Tchebycheff tapered balun transformer which will function over frequency bandwidths as great as 100:1 is presented. The balun is an impedance matching transition from coaxial line to a balanced, two-conductor line. The transition is accomplished by cutting open the outer wall of the coax so that a cross-sectional view shows a sector of the outer conductor removed. As one progresses along the balun from the coaxial end, the open sector varies from zero to almost 2?, yielding the transition to a two-conductor line. The balun impedance is tapered so that the input reflection coefficient follows a Tchebycheff response in the pass band. To synthesize the impedance taper, the impedance of a slotted coaxial line was obtained by means of a variational solution which yielded upper and lower bounds to the exact impedance. Slotted line impedance was determined experimentally by painting the line cross section on resistance card using silver paint and measuring the dc resistance of the section. The measured VSWR of a test balun did not exceed 1.25:1 over a 50:1 bandwidth. Dissipative loss was less than 0.1 db over most of the range. Measurements show that the unbalanced current at the output terminals is negligible.
148 citations
Patent•
13 May 1980
TL;DR: In this article, an improved array of electrodes for delivering electromagnetic energy to a localized area of a patient's body in a hyperthermic treatment so that it provides a uniform distribution of electromagnetic flux lines within the localized area, in order to produce a uniform and localized heating gradient.
Abstract: The present invention is an improved array of electrodes for use in delivering electromagnetic energy to a localized area of a patient's body in a hyperthermic treatment so that it provides a uniform distribution of electromagnetic flux lines within the localized area of the patient's body in order to produce a uniform and localized heating gradient. The improved array of electrodes includes a plurality of electrodes which are arranged in pair, with the electrodes in each pair being spaced a particular distance apart. The improved array of electrodes are driven by a balanced line system which is electromagnetically coupled to each pair of electrodes and which is shielded by a ground coaxial shield which itself is ground to the body of the patient. Each electrode is embedded in a Teflon stand-off in order to move the region of strong field, from the body, produced by rapidly changing potentials. The two pairs of electrodes forming a cross like geometry are used with the balanced line systems. The electrical power is either multiplexed among the electrodes or the second pair is driven by a potential which is sinusoidal and which is 90° out of phase with the first balanced line system which is also sinusoidal.
130 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 5 |
| 2020 | 9 |
| 2019 | 7 |
| 2018 | 11 |
| 2017 | 12 |
| 2016 | 18 |