antenna length

antenna length

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• Linear-Loaded Inverted V - How do you fit a full length 160 meter antenna into a 40 foot deep yard?
  [ Hits: 23277 | Votes: 7 | Rating: 6.72 ]
• Double Extended Zepp Antenna  ^pop - This double extended Zepp provides 3 db gain over a dipole on the band it is designed for. Each side or leg is about 5/8 wavelength long.
  [ Hits: 26154 | Votes: 28 | Rating: 6.35 ]

• 7 Elements YAGI for 144 Mhz  ^pop - The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz SSB/MGM band, in PDF Format
  [ Hits: 42745 | Votes: 49 | Rating: 5.87 ]
• QM5 Yagi for 2 meters band - The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
  [ Hits: 6869 | Votes: 4 | Rating: 5.25 ]
• QM7 7 elements 144 MHz Yagi-Uda Antenna - The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
  [ Hits: 5361 | Votes: 15 | Rating: 5.27 ]

• Amateur Vertical Antenna Calculator  ^pop - This basic calculator is designed to give the aproximate length (height) of a particular vertical antenna, for the frequency and wavelength chosen.
  [ Hits: 46450 | Votes: 230 | Rating: 5.48 ]

• Beverage Antennas - So you want to build a Beverage Antenna. This article offers insights on building a two-wire Beverage antenna for better reception. Key points include using long wire (at least a wavelength, ideally two), keeping it straight and away from vertical conductors, and sloping ends for noise reduction. The author recommends copper clad wire and mentions transformer design considerations for later discussion.
  [ Hits: 6543 | Votes: 5 | Rating: 7.2 ]
• Beverage Antenna Construction - Types of beverage wires, choose best supports and insulators, multiple antennas at one feedpoint, all well documented with photos and exaustive explanation. This article offers insights on building Beverage antennas for optimal reception. Key takeaways include using strong wire (copperweld or electric fence), proper termination, and a good grounding system (multiple copper rods). The author recommends maximizing antenna length and orienting it towards desired stations. For best results, utilize an antenna tuner and experiment with termination resistors.
  [ Hits: 15518 | Votes: 9 | Rating: 8.45 ]

• The G5RV Antenna System Re-Visited - The original G5RV antenna system consists of a center-fed horizontal 102' wire plus a 34' length of open-wire 525-Ohm feeder. Louis Varney, the antenna system's developer, intended two other features. Learn more at Cebik website
  [ Hits: 4661 | Votes: 0 | Rating: 0 ]

• Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
  [ Hits: 4306 | Votes: 2 | Rating: 8.5 ]

• Thinking about Ideal Loops - Loop antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.
  [ Hits: 2271 | Votes: 6 | Rating: 7.33 ]

• A Portable Multi-Band Magnetic Loop Antenna  ^pop - Described here is a simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, but by changing the overall length of the wire coverage of other bands is feasible
  [ Hits: 34659 | Votes: 12 | Rating: 6.33 ]

• Cubical Quad Antenna Design  ^pop - By N6VNG, can be used to determine the element lengths and the gamma match values for different frequencies, includes link to excel files with formulas to dimension your quad antenna.
  [ Hits: 30805 | Votes: 88 | Rating: 5.74 ]

• How to build a tuned loop antenna - How can you vastly improve your Medium Wave reception? its quite simple really, all you need is 120 foot of wire, a few lengths of timber and an old tuning capacitor with which you can build the answer to every DX'ers prayers, a tuned loop antenna.
  [ Hits: 24076 | Votes: 21 | Rating: 8.1 ]

• Crossed Field Antenna - The Crossed Field Antenna (CFA) is one of the applications of Correction of Maxwell's Equations which was used over 150 years ago which was proved these days that the Magnetic Field Source is only the Displacement Current not the Conduction Current . These Corrections was made by an Egyptian Doctor Engineer Fathi Kabbary , who reached the New Correct Theory which shows that the height and efficiency of the antenna doesn't depend on the wavelength
  [ Hits: 2308 | Votes: 5 | Rating: 2.8 ]
• Interference Cancelling System - The use of interference signal cancellation has been around for some time. The idea is to use an auxiliary antenna almost any random length of wire in addition to the main receiving antenna
  [ Hits: 1867 | Votes: 1 | Rating: 3 ]

• VHF/UHF Yagi Antenna Design  ^pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
  [ Hits: 147433 | Votes: 1105 | Rating: 6.95 ]

• Random length wire antennas - Random Length Wire Antennas by WØIPL
  [ Hits: 726 | Votes: 2 | Rating: 5.5 ]
• LF/VLF Portable Loop Antenna - The octoloop antenna is a length of 25 pair telephone wire inside an octagonal loop shield of 3/4 hard copper pipe
  [ Hits: 3571 | Votes: 11 | Rating: 5.08 ]

• Wavelength USA - Hamsticks, mobile and base antennas
  [ Hits: 1369 | Votes: 2 | Rating: 6.5 ]

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