Balanced Transmission Lines is aka as

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carry currents of equal magnitude w/ res to the electrical ground but travel in opposite directions

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flow in the SAME direction

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currents that flow in OPPOSITE directions in a balanced wire

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most interference induced equally in both wires 

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UNBALANCED TRANSMISSION LINES aka

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one wire is at GROUND POTENTIAL whereas the other wire is at SIGNAL POTENTIAL

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only one wire for each signal, and only one ground line

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ircuit device used to connect a balanced transmission line

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it can connect and unb (coaxial c/ to a balanced load (dipole antenna), this is called a

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used for relatively low frequencies

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- choke

- sleeve

- bazooka

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relatively high frequency

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is placed around and connected to the outer conductor

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outer conductor no longer has a zero impedance to ground 

7 - 9p degree phase shift +/4 to the line

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two parallel conductor spaced 2-6 inches apart, operated in the BALANCED MODE

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is AIR, velocity of TEM W is slightly slower than light

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ABSENCE of SHIELDING - increases

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same as the two wire open line except that uniform spacing is assured by embedding the two wires in a low-loss solid dielectric

(a)  

TWO WIRE RIBBON CABLE aka

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examples of solid dielectric _____,______

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used to connect a television receiver antenna

(a)  

connector for the Twin Lead

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consist of two insulated wires with diff TWIST LENGTH (PITCH) to form a flexible line without the use of spacers

(a)  

to reduce EMI bet pairs due to mutual induction (such as CROSSTALK) 

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most common DATA NETWORKING

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often installed using a REGISTERED JACK 45 (RJ-45) connector

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is an 8 wire connector used commonly to connect computers onto a local-area network (LAN), especially ETHERNET

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parallel two wire consisting of copper conductors separated by a solid dielectric

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enosed in a conductive metal sleeve 

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sleeve woven into a mesh

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prevents radiation losses, prevents external EMI as noise and radio in

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thicker and less flexible than UTP 

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INVENTED BY PN AND CC 1950s

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difficult to install and expensive

(a)  

greater security and imujnity to interference

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C7

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aka PiMF (pairs in metal foil)

(a)  

4 pairs of AWG 22 or 23 copper pairs surrounded by a common metallic FOIL followed by a BRAIDED metallic SHIELD

(a)  

- 4 pairs of AWG 24

- encapsulated in a common metallic FOIL shield with a PVC outer sheath

(a)  

surrounded common metallic FOIL shield encapsulated in a BRAIDED metallic SHIELD

(a)  

consist of parallel conductors sep from each other and surrounded by a SOLID DIELECTRIC

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Looks much like the POWER CORD of a washing machine or refrigerator

(a)  

conductors are balanced to ground

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capa between the wires is uniform throughout the length of the line

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isolates the conductors from strat magnetic fields

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- minimize radiation losses

- interference induced

(a)  

- expen

- must be kept dry to prevent excessive leakage

- high fre losses, limit the practical length of the line

(a)  

made of PYREX, POLYSTYRENE, or some other material that has good insulating characteristics and low dielectric losses at high frequencies

(a)  

 insulated from the outer conductor by insulating SPACERS OR BEADS at regular intervals

(a)  

consist of a centra, insulated wire (inner conductor) mounted inside a tubular outer condition

(a)  

unaffected by seawater, gasoline, oil, and most other liquids

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is a solid substance that remains FLEXIBLE over a wide range of temperature

(a)  

developed to replace RUBBER and eliminate HIGH FREQUENCY LOSSES

(a)  

made with an inner conductor that consists of FLEXIBLE WIRE insulated from the outer conductor by a solid, continuous insulating material

(a)  

LEAKAGE CAUSED BY CONDENSATION OF MOISTURE - prevented by the use of

(a)  

dry the line when it is first installed & pressure is maintained to ensure that no moisture enters the line

(a)  

common type of RF CONNECTOR for coaxial cable

(a)  

BNC

(a)  

used with radio, tv and other radio fre eq was once popular COMPUTER NETWORK CONNECTOR 

(a)  

BNC DEVELOPWRS

(a)  

usually applied for FREQ BELOW 3GHz and voltages below 500V

(a)  

made to match the characteristi IMPEDANCE of cable at either 50 OR 75 OHMS

(a)  

Threaded RF CONNECTOR used to JOIN coaxial cable

(a)  

one f first connectors capable of CARRYING MICROWAVE FREQUENCY SIGNALS

(a)  

threaded ver of BNC connector

(a)  

has 50, ohm impedance

(a)  

- has been employed in wide range of RADIO & WIRED APPLICATIONS

(a)  

TNC

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