Model the characteristic of aerial: J antenna calls Polack aerial again, its characteristic is radiation angle of elevation low and have certain gain, efficiency is 1/4 GP antenna is duple. J antenna the part above is radiation paragraph, the part of

As defend inspect burn friend, having antenna of a few paraboloid is unchallenged. But, among them oneself start work those who do how much don't have. Oneself used leisure time last year (6, July) , oneself start work made antenna of paraboloid of o

Aerial is the tool that receiver takes signal, use 8 wood for the most part with the antenna that receives at long-range FM broadcasting (YAGI) antenna, the unit number of 8 wood antenna receives an effect receive range, unit number is more, criterio

The input impedance of aerial is the ratio that aerial feed end inputs voltage and input electric current. The join of aerial and line of make a present of, optimal case is aerial input impedance is pure resistor and the characteristic impedance that

The active of aerial brace up child the distance makes an appointment with 5 ～ between feed end 10 millimeter. I was not added evenly - lopsided converter, 50 ohmic and coaxial cable receives active directly brace up child. Horizontal Zhen Zizu fight

One of basic functions of emissive antenna are an energy that obtains from line of make a present of to all round dimensional radiate goes out, of basic function is the directional radiate that wants place of major energy face. Perpendicular half pla

1 antenna 1.1The action of aerial and position The power of radio frequency signal that radio catapult outputs, through line of make a present of (cable) carry aerial, go out with radiate of electromagnetic wave form by aerial. Electromagnetic wave a

As a result of the swift and violent development of mobile, at present a lot of countrywide areas are put in the situation that much net coexists, namely net of A, B, G3 coexists, the G net that has some of area among them still includes GSM9000 and