One, aerial efficiency Height of erect of length of frequency of appearance of qualitative, antenna, job, antenna, antenna concerns the conductor material of aerial efficiency and erect antenna. 1, aerial material is qualitative Choose electric prope

Because FM broadcasting content is rich, acoustic quality good, frequency is noisy the upper limit that the frequency frequency of the FM broadcasting with wide, good quality answers can amount to 15000Hz, especially FM stereo beamed appears, more ac

This is a tall gain that makes easily simply directional antenna, classical structure of 8 wood antenna, pursue as follows: Note: 8 wood invent Japanese this kind of antenna, friend calls 8 wood aerial. In the graph linear brace up child with alumini

Amateur makes the point of paraboloid antenna---The relation of the radiation deflection Q of the F/D of paraboloid antenna and source of make a present of F/D (the focus that F is parabola, the caliber that D is parabola) the deflection Q with sourc

Want to do a few each frequency of late paragraph 8 wood are directional aerial, saw a few about 8 wood the book of directional antenna, summed up the following experience (the rule) , it is the thing on the book, the likelihood is not certain and co

8 wood antenna makes FM3 unit: Optional diameter is the material that make the copper of 6~8mm, aluminium or stainless steel canal, I chose the stainless steel control of the easiest draw materials to make namely, whole deputy antenna sparkles shine

8 wood antenna is one kind is brought to aerial, by an active many passive Zhenzi places Zhen Zihe to go up in same plane, and perpendicular at join the metallic lever of their center. General a passive brace up child for reflector, the passive of th

J antenna is theoretic Ba Lun does not need when the gain that has 3db is installed, and bottom can be installed receive with earth edge on iron lever, facilitate prevent thunder. Oneself get J of one finished product antenna occasionally, but use fr