Transmission Line And Antenna

The system is composed of:
- RF transmitter
- Transmission lines components
- Components for transmission lines measurements
- Reflectometer bridge
- Elements for different kinds of antennas
- Voltage and current and field strength meters along the line
and antenna elements
- Storage tray containing the instruments and components
- Theoretical-experimental handbook
TRAINING PROGRAM
• Transmission lines
- Characteristic impedance
- Different types of lines
- Impedance matching
- Impedance mismatching
- Mismatching effects: standing waves
- Impedance matching with lambda/4 transformer
- Propagation speed
- Speed factor of a line
- Measurement of the losses on a line
• Basic antennas
- Radiation of a balanced line
- Impedance matching between generator and antenna
- Radiation of an open balanced line: dipole
- Voltage and current distribution in the dipole
- Conditions for the radiation: resonance frequency
- Band pass of thin and thick dipole
- Radiation diagram: horizontal polarization
vertical polarization
- Folded dipole
- Slot antenna
- Ground plane antennas
• Composite antennas
- Passive elements: YAGI antennas with reflector and directors
- Radiation diagrams of YAGI antennas
- Bandwidth of YAGI antennas
- Circular polarization: spiral antennas
- Broad-band antennas: batwing antennas
TECHNICAL SPECIFICATIONS
• RF transmitter:
- Frequencies programmable in UHF band
- Power: 1.5 Watt maximum adjustable with automatic level
control (ALC)
- Output impedance: 75 Ohm
- Modulation: Amplitude at 1000 Hz
- Wobbulation: ±15MHz
- 2 battery recharger for field strength meters
• Reflectometer bridge:
- Operating frequency: 1-860MHz
- Impedance: 75 Ohm
- Variable gain selective amplifier
• Field strength meter:
- Led bar indicator
- Powered with rechargable batteries
• Voltage and current detectors:
- Led bar indicator
- Powered with rechargeable batteries
• VSWR meter
• Slotted line:
- Impedance: 75 Ohm
- Length: 44 cm
- Containing: 2 probes for voltage measurement
2 probes for current measurements
• Balanced lines, 300 and 75 Ohm
• Coaxial lines:
- Coaxial cables of different length at 75 and 50 Ohm, at 1/4
and 1/2 lamda
• Antenna stand system with graduated base for radiation
diagram measurements
• Dipole with lamps to display the current distribution in the
dipole
• Thin dipole
• Thick dipole
• Balanced/unbalanced transformer 4:1 (300/75 Ohm)
• Balanced/unbalanced transformer1:1
• Folded dipole
• Passive elements of different length to carry out reflectors
and directors in YAGI antenna
• GROUND-PLANE antenna with variable inclination radial
elements
• Slotted antenna (SLOT)
• Spiral antenna with circular polarization
Broad band BATWING antenna
• Storage tray for the components
• Power supply: 230Vac (110Vac upon request) – 50/60 Hz
• Tray dimensions: 605x255x470 mm
INCLUDED ACCESSORIES
• Theoretical-experimental handbooks
• Power supply cord
• Component holding tray
OPTIONAL ITEMS
• Field meter
• Spectrum analyzer
SOFTWARE
• Multimedia Educational Software
“TELECOMMUNICATIONS”