90 element

90 element

Antennas : Array

• The Impact of Current Distribution on Array Patterns - Technical Correspondence, QST, July 1990 - Why even "perfect" phased array element currents don't produce perfect patterns.
  [ Hits: 755 | Votes: 1 | Rating: 10 ]
• Bobtail dipole - Bobtails are vertical arrays that look like the letter "E" turned 90° clockwise onto its tails. They have 3 quarter wave vertical elements and are one wavelength long. The Half Square is a shortened Bobtail- it has 2 quarter wave vertical elements and is a half wave long.
  [ Hits: 1913 | Votes: 0 | Rating: 0 ]

• 900 MHz Quagi antenna - A 10 elements quagi antenna for the 900 MHz band
  [ Hits: 1072 | Votes: 7 | Rating: 6 ]

• A low pass filter circuit - A simple 7 element, Chebyshev low pass filter, rolls of at 30MHz. Attenuation is better than -40dB at 60MHz, -65dB at 90MHz, -80dB at 120MHz.
  [ Hits: 5303 | Votes: 21 | Rating: 6.1 ]