impedance

impedance

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• Magnetic Long Wire UnUn 9:1 - An impedance transformer (9:1) to feed a high impedance long wire (~450 ohm), down to a 50 ohm unbalanced coaxial input.
  [ Hits: 1929 | Votes: 4 | Rating: 7 ]
• Tuner Baluns on Input - There is a common perception that placing a balun on the input of a tuner causes the balun to work better. The thought is the balun operates with a matched impedance and that reduces balun losses. It also is thought that moving the balun improves balance.
  [ Hits: 594 | Votes: 1 | Rating: 1 ]

• 1:4 Current Balun - This project is intended to aid in tuning a balanced antenna or feedline that has a high impedance 100-600 ohms
  [ Hits: 3414 | Votes: 5 | Rating: 8 ]

• The Sloping Vertical Dipole - The radiating part is the vertical half of the dipole. You get nearly radiation in all directions, the second half must not be in 180°. The table below show how we get an impedance for direct feeding of 50Ohm coax. by DK7ZB
  [ Hits: 537 | Votes: 0 | Rating: 0 ]

• The Coaxial Line - Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
  [ Hits: 888 | Votes: 0 | Rating: 0 ]
• All About Ham Radio Ladderline - Ladder Line Myths, Line Types, Spacing and Impedance, Length by KV5R
  [ Hits: 1152 | Votes: 2 | Rating: 9 ]

• From Transmitter to Antenna - A collection of articles on the subject of impedance, impedance matching and high-frequency power transmission by G3YNH
  [ Hits: 1159 | Votes: 0 | Rating: 0 ]

• Matching Waves, VSWR at work - When the radiation resistance (voltage to current ratio) of an antenna is the same value as the characteristic impedance of the transmission line (voltage to current ratio in the line), all of the electrical energy transmitted down the line is taken by the antenna and radiated into space in the form of a radio wave.
  [ Hits: 507 | Votes: 0 | Rating: 0 ]
• Basics of antennas - The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.
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• Yagi matching - A description of the concepts of Yagi matching - T match and general impedance matching by K2RIW
  [ Hits: 1561 | Votes: 1 | Rating: 1 ]
• Antenna Matching - Antennaa matching basics, matching input impedance, reactance vs. SWR, info on inductive matching and UNUN Matching systems. Capacitive Matching Odds & Ends by K0BG
  [ Hits: 1782 | Votes: 5 | Rating: 7 ]
• Antena gamma match - Gamma match antenna is an antenna 1/2 additional lambda with the impedance matching more flexible arrangements (var capacitor) by sliding through the gamma match/road.
  [ Hits: 2179 | Votes: 10 | Rating: 4.1 ]

• Controlled impedance cheap VHF UHF Antennas - Cheap UHF antenna plans for 2 meters and up including 421 1296 and 902 Mhz
  [ Hits: 1522 | Votes: 0 | Rating: 0 ]

• HiZ-Antennas - High impedance amplifiers for shortened vertical antennas, Array matched and Optimized 15dB Preamplifier
  [ Hits: 858 | Votes: 2 | Rating: 6 ]

• Hittite Microwave Corporation - Amplifiers, filters, attenuators, mixers, PLL, switches and frequency dividers, signal generators, power detectors, transimpedance amplifiers, variable gain amplifiers and more
  [ Hits: 555 | Votes: 0 | Rating: 0 ]

• RF Cool Tools Real Time Design - RFCoolTools RLC Filter Simulation, S-parameter Plotter, Filter Optimization,Broadband Impedance Match
  [ Hits: 3451 | Votes: 57 | Rating: 4.66 ]

• EIS Spectrum Analyser - Freeware program for analysis and simulation of impedance spectra
  [ Hits: 5508 | Votes: 10 | Rating: 5.4 ]

• RF Attenuator Calculator - This is an on-line rf attenuator calculator provided free in order to promote the FLEXI-BOX. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a matching Pi attenuator
  [ Hits: 469 | Votes: 4 | Rating: 5.25 ]

• Coaxial Cable The neglected link - The purpose of this document is to show the transfer impedance and shielding effectiveness of different types of coaxial cables
  [ Hits: 715 | Votes: 2 | Rating: 4.5 ]

• Tri-Mode Buffer Amplifier Box - The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.
  [ Hits: 964 | Votes: 1 | Rating: 1 ]

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