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• FM BROADBAND ANTENNAS
( Dipole, Yagi, Panel, Circular),
• VHF-UHF-SHF ANTENNAS
( Corner, Yagi, Parabols from 200 Mhz to 2,5 Ghz),
• FM STAR TYPE COMBINERS
• FM DOUBLE BRIDGE COMBINERS
• COAXIAL CAVITIES AND NOTCH
• POWER SPLITTERS
• HYBRID COUPLERS
• DIRECTIONAL COUPLERS
• CABLES, CONNECTORS AND ADAPTERS
• INSTALLATION ACCESSORIES
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L A B E L I T A L Y S R L - V i a S . A l l e n d e , 5 9 – 4 1 1 2 2 M O D E N A
w e b - w w w . l a b e l i t a l y . c o m
GENERAL RULES
T E L : 0 5 9 / 3 6 2 9 9 3
P . I V A 0 2 5 7 8 7 5 0 3 6 2
F A X : 0 5 9 / 3 7 6 0 5 6
C a p i t a l e S o c i a l e 3 2 . 5 0 0 E u r o
e - m a i l - i n f o @ l a b e l i t a l y . c o m
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Related Manuals for Label Italy Dipole
Summary of Contents for Label Italy Dipole
- Page 1 GENERAL RULES • FM BROADBAND ANTENNAS ( Dipole, Yagi, Panel, Circular), • VHF-UHF-SHF ANTENNAS ( Corner, Yagi, Parabols from 200 Mhz to 2,5 Ghz), • FM STAR TYPE COMBINERS • FM DOUBLE BRIDGE COMBINERS • COAXIAL CAVITIES AND NOTCH • POWER SPLITTERS •...
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Page 2: Warranty
This warranty does not cover transportation or installation cost that may be incurred. Label Italy’s sole liability is the remedy of any defect for 1 year. Label Italy is not responsible for personal injury or property damage resulting from improper or careless installation or usage not intended by the manufacturer. - Page 3 The most important and preferred criteria that must be followed for the protection of the radio electrical stations are normally the following: 1) Creation of a valid grounding system for the whole site, this system must have a low resistance value of discharge dispersion.
- Page 4 An electromagnetic wave It is important to match the polarization of the RF antenna to that of the incoming signal. In this way the maximum signal is obtained. If the RF antenna polarization does not match that of the signal there is a corresponding decrease in the level of the signal.
- Page 5 An example for a simple horizontal polarization dipole antenna is shown below. Polar diagram of a half wave dipole in free space Antenna designs are often categorized by the type of polar diagram they exhibit.
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Page 6: Antenna Gain
The most common type is a simple dipole as it is easily available and it is the basis of many other types of antenna. In this case the gain is often expressed as dBd i.e. gain expressed in decibels over a dipole. However a dipole does not radiated equally in all directions in all planes and so an isotropic source is sometimes used. - Page 7 SUGGESTED GUYED MAST SECTION Is suggested install FM Dipole Antennas over guyed masts because the section higher than 110mm can be increase the SWR value and modify the radiation pattern. DISTANCE ESTIMATION BETWEEN FM ANTENNA BAYS Wave Lenght = λ...
- Page 8 RETURN LOSS - VSWR When designing or building an electronic circuit using radio frequency elements the return loss is of great importance as are the voltage standing wave ratio, and reflection coefficient for the signal. This can be of great importance when using or designing RF equipment. While it is often necessary to calculate the VSWR or return loss when undertaking RF design or maintaining or using RF equipment it can sometimes be useful to convert between return loss, VSWR and voltage reflection coefficient.
- Page 9 Some criteria for evaluating antennas Typical cases of doubt: • high reflected power, • a high VSWR, • a bad adaptation, • It seems that the antenna absorbs abnormally power from the transmitter To properly diagnose these apparent failures we have to find out if the cause is the same product just purchased or poor installation of the same.
- Page 10 What is the DC continuity measurement using an ohmmeter? Some antennas have direct ground lightning protection. These normally measure as a DC short between the connector’s inner and outer conductor but will be the proper 50 Ohm RF impedance . See lightning notes in the catalog specs to determine if this antenna model should measure as an open or a short.
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