.net barcode reader library Transmission line characteristics in Software

Generating ECC200 in Software Transmission line characteristics

Table 3-1 Transmission line characteristics
Data Matrix 2d Barcode Scanner In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Paint Data Matrix ECC200 In None
Using Barcode creator for Software Control to generate, create ECC200 image in Software applications.
Type of line 2-in TV parallel line (air dielectric) 1-in TV parallel line (air dielectric) TV twin lead UHF TV twin lead Polyethylene coaxial cable Polyethylene foam coaxial cable Air-space polyethylene foam coaxial cable Teflon
DataMatrix Decoder In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Data Matrix ECC200 Creator In C#
Using Barcode encoder for .NET Control to generate, create Data Matrix 2d barcode image in VS .NET applications.
* Various impedances depending upon cable type
Data Matrix ECC200 Generator In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create Data Matrix image in ASP.NET applications.
Data Matrix ECC200 Maker In .NET
Using Barcode creation for VS .NET Control to generate, create Data Matrix image in VS .NET applications.
Zo (ohms) 300 450 300 300 * * * *
Painting ECC200 In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create Data Matrix 2d barcode image in VS .NET applications.
UPC-A Supplement 5 Encoder In None
Using Barcode creator for Software Control to generate, create UPC-A Supplement 2 image in Software applications.
Velocity factor v 095 095 082 080 066 079 086 070
Bar Code Creation In None
Using Barcode creator for Software Control to generate, create barcode image in Software applications.
Code 128 Creator In None
Using Barcode drawer for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
Transmission line noise
Encode EAN / UCC - 13 In None
Using Barcode maker for Software Control to generate, create EAN / UCC - 13 image in Software applications.
Make Bar Code In None
Using Barcode encoder for Software Control to generate, create barcode image in Software applications.
Transmission lines are capable of generating noise and spurious voltages that are seen by the system as valid signals Several such sources exist One source is the coupling between noise currents flowing in the outer conductor and the inner conductor Such currents are induced by nearby electromagnetic interference and other sources (eg, connection to a noisy groundplane) Although coaxial design reduces noise pickup, compared with parallel line, the potential for EMI exists Selection of high-grade line, with a high degree of shielding, reduces the problem Another source of noise is thermal noises in the resistances and conductances This type of noise is proportional to resistance and temperature
4-State Customer Barcode Creation In None
Using Barcode creator for Software Control to generate, create 4-State Customer Barcode image in Software applications.
Bar Code Maker In Objective-C
Using Barcode creator for iPhone Control to generate, create bar code image in iPhone applications.
Transmission line characteristics 69 There is also noise created by mechanical movement of the cable One species results from the movement of the dielectric against the two conductors This form of noise is caused by electrostatic discharges in much the same manner as the spark created by rubbing a piece of plastic against woolen cloth A second species of mechanically generated noise is piezoelectricity in the dielectric Although more common in cheap cables, one should be aware of it Mechanical deformation of the dielectric causes electrical potentials to be generated Both species of mechanically generated noise can be reduced or eliminated by proper mounting of the cable Although rarely a problem at lower frequencies, such noise can be significant at microwave frequencies when signals are low
Encoding GS1 DataBar Limited In VS .NET
Using Barcode encoder for VS .NET Control to generate, create DataBar image in Visual Studio .NET applications.
GS1 DataBar Generation In Java
Using Barcode generator for Java Control to generate, create GS1 DataBar image in Java applications.
Coaxial cable capacitance
Recognizing Data Matrix ECC200 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Encode GS1 128 In None
Using Barcode creation for Word Control to generate, create GS1-128 image in Word applications.
A coaxial transmission line possesses a certain capacitance per unit of length This capacitance is defined by pF 24e C= [38A] log (D/d) m A long run of coaxial cable can build up a large capacitance For example, a common type of coax is rated at 65 pF/m A 150-m roll thus has a capacitance of 65 pF/m (150 m), or 9750 pF When charged with a high voltage, as is done in breakdown voltage tests at the factory, the cable acts like a charged high-voltage capacitor Although rarely (if ever) lethal to humans, the stored voltage in new cable can deliver a nasty electrical shock and can irreparably damage electronic components
Bar Code Scanner In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Barcode Creation In VS .NET
Using Barcode creation for .NET Control to generate, create barcode image in .NET framework applications.
Coaxial cable cutoff frequency Fo
The normal mode in which a coaxial cable propagates a signal is as a transverse electromagnetic (TEM) wave, but others are possible and usually undesirable There is a maximum frequency above which TEM propagation becomes a problem, and higher modes dominate Coaxial cable should not be used above a frequency of F= 675 (D + d) GHz [38B]
where F is the TEM-mode cutoff frequency D is the diameter of the outer conductor, in inches d is the diameter of the inner conductor, in inches e is the dielectric constant When maximum operating frequencies for cable are listed, it is the TEM mode that is cited Beware of attenuation, however, when making selections for microwave frequencies A particular cable may have a sufficiently high TEM-mode frequency, but still exhibit a high attenuation per unit length at X or Ku bands
70 Transmission lines
Transmission line responses
In order to understand the operation of transmission lines, we need to consider two cases: step-function response and the steady-state ac response The step-function case involves a single event when a voltage at the input of the line snaps from zero (or a steady value) to a new (or nonzero) value, and remains there until all action dies out This response tells us something of the behavior of pulses in the line, and in fact is used to describe the response to a single-pulse stimulus The steady-state ac response tells us something of the behavior of the line under stimulation by a sinusoidal RF signal
Copyright © OnBarcode.com . All rights reserved.