In a half-wave dipole, where does the minimum impedance occur?
A half-wave dipole antenna is normally fed at the point where:
In a half-wave dipole, the lowest distribution of _________ occurs at the middle.
In a half-wave dipole, the highest distribution of ________ occurs at the middle.
In a half-wave dipole, the distribution of _______ is lowest at each end.
The slot-fed Yagi aerial employs a half wavelength dipole (3) composed of two pieces of thin metal rods, and its feeding section is of a shielded slot structure (6), and its feeding is realized by the slot (7).
If you made a half-wavelength dipole antenna for 28.150 MHz, how long would it be?
If you made a half-wavelength dipole antenna for 28.550 MHz, how long would it be?
half-wave loss free dipole in space
If you made a half-wavelength vertical antenna for 223 MHz, how long would it be?
Figure 2: A two-element array of a half-wave resonant dipole as a driver and a shorter one as the parasite.
A directive antenna (Ai) of reduced size for emission in the FM band comprises a supplied source (1) of the half-wave dipole type and a non supplied source (2).
In lots of situations, even a simple half wave dipole on 40 meters just will not fit…..Murphy’s law.
At very low heights (in wavelengths !) even the radiation resistance of a full size half wave dipole is only a fraction of an .
The non supplied source comprises at least one elongate conductor element (21, 22) extending along a lontitudinal axis (H1-H1, H2-H2) secant with the longitudinal axis (D-D) of the half-wave dipole (1).
What is the low angle radiation pattern of an ideal half-wavelength dipole HF antenna in free space installed parallel to the Earth?
The figure opposite represents the variation of the impedance measured with the bottom of a coaxial line (75 ohms) supplying a dipole half-wave for the tape 40 meters.
The figure opposite represents the variation of the impedance measured with the bottom of a coaxial line (75 ohms) supplying a dipole half-wave for the tape 40 meters.
If the ohmic resistance of a half-wave dipole is 2 ohms, and the radiation resistance is 72 ohms, what is the antenna efficiency?
The whip antenna generally has an omnidirectional reception pattern, with maximum sensitivity in directions perpendicular to the antenna axis, and gain similar to the half-wave dipole.
The figure opposite represents the variation of the impedance measured with the bottom of a coaxial line (75 ohms) supplying a dipole half-wave for the tape 40 meters.
Why is a ground-mounted vertical quarter-wave antenna in reasonably open surroundings better for long distance contacts than a half-wave dipole at a quarter wavelength above ground?
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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