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Contents
• Projects
• Eprom Wave Player
• CETH-60 Counter
• Preamplifier
• Prescaler : 1000 / 1.5 GHz
• Prescaler : 1000 / 12 GHz
• 10 MHz OCXO
• Function Generator (with XR2206)
• DDS Generator (with AD9851)
• VHF Airband Receiver with DDS
• HF Receiver with DDS
• Curve Tracer (simple)
• Curve Tracer (advanced)
• DCF-77 Signal Generator
• Homebrew Geiger Müller Counter
• Logarithmic Amplifier with AD8307
• GAIN - PHASE - ADAPTER USING THE AD 8302
• Power Supply
• PETH-20 Power Supply • +/- 15 V, 600 mA
• PETH-30 Power Supply
• PETH-40-HAM Power Supply • +/- 15 V, 1.5 A
• PETH-49 Power Supply • 1 ... 19 V, 2 A
• PETH-9910 Power Supply • 8 ... 16 V, 10 A
• Power Supply Designer
• VB 408 Replacement
• Artificial Ground
• Amplifier Design • Amplifiers
• MAR, ERA, GALI Amplifier Bias Calculator
• BJT Buffer Amplifier Designer (Collector Feedback Bias)
• BJT Buffer Amplifier Designer (Base Bias Network)
• BJT Buffer Amplifier Designer (Voltage Feedback Bias)
• BJT Buffer Amplifier Designer (Emitter Feedback Bias)
• Broadband VHF Power Amplifier, 3 ... 540 MHz, 1.5 W
• BJT Amplifier Bias Calc.
• FET Amplifier Bias Calc.
• Opamp Calculations
• Slew-Rate Considerations
• Antenna Design
• Bi-Quad Antenna Designer
• Cantenna Calculator
• Discone Antenna Designer
• HB9CV Antenna Calculator
• Helix Antenna Calculator
• Helix Antenna with Match Calculator
• Lambda/4 Groundplane designer
• Logarithmic Periodic Dipole Antenna Calculator
• Yagi Uda Antenna Designer
• J-Pole Antenna
• Wokatenna Design
• Dipole Construction
• Filter Design (AUDIO)
• 50 Hz / 60 Hz Notch Filter Designer
• Bainter Notch Filter Calculator
• Sallen-Key Lowpass
• Sallen-Key Highpass
• Bandpass Filter Design Guide
• Sallen-Key Bandpass
• Active Bessel Bandpass Filter 4th order
• Active Bessel Highpass • Lowpass Filter 12 dB/octave
• Active Bessel Highpass Filter 24 dB/octave
• Active Bessel Lowpass Filter 24 dB/octave
• Active Butterworth Highpass Filter 24 dB/octave
• Active Butterworth Lowpass Filter 24 dB/octave
• Active Butterworth Bandpass Filter 4th order
• Active Chebyshev Bandpass Filter 4th order
• Active Linkwitz Highpass Filter 24 dB/octave
• Active Linkwitz Lowpass Filter 24 dB/octave
• Simple Bandpass Filter
• Narrow Bandpass Filter
• Notch Filter
• Filter Design (RADIO)
• Butterworth Lowpass Filter
• Butterworth Highpass Filter
• Butterworth Bandpass Filter
• Butterworth Bandstop (Notch) Filter
• Chebyshev Lowpass Filter
• Chebyshev Highpass Filter
• Chebyshev Bandpass Filter
• Chebyshev Bandstop (Notch) Filter
• Combline Bandpass Filter Design
• Constant K Lowpass Filter
• Constant K Highpass Filter
• Constant K Bandpass Filter
• Crystal Filter Design
• Interdigital Bandpass Filter
• Components
• Attenuator
• Coax Calculator
• Diel. Coax Resonator
• Helical Coil Calculator
• Wire inductance Calculator
• Iron Powder Toroidal Coil
• Ferrite Toroidal Coil
• Heatsink Calculator
• Diplexer Bandpass
• Diplexer Lowpass
• Matching Network
• Broadband Impedance Matching with Transformer
• Wilkinson Power Split
• Coaxial Power Split
• Resistive Power Split
• Power Transformer Design :: EI • M Core
• Resistor Colour Code (Decoder:-) :: 4 RINGS
• Resistor Colour Code (Decoder:-) :: 5 RINGS
• Resistor Colour Code (Decoder:-) :: 6 RINGS
• Software
• RFSim99
• AppCad
• Mini Ring Core Calculator
• Datasheets, Manuals
• Datasheet Collection of our Projects
• HP Service Manuals
• Papers of Changpuak
• Engineering Formula Collections / Goodies
• PLL, VCO, Oscillator
• 4046 VCO Dimension
• PLL Loopfilter Designer
• PLL Loopfilter Designer V2
• NE 555 Oscillator
• NE 555 Monoflop
• RC HCT Inverter Oscillator
• Circuit Collection : Oscillators
• Tutorials
• Klirrfaktor
• Noise
• PLL Seminar
• PLL Seminar #1 - Theory
• PLL Seminar #2 - Loop Filter Calculations
• PLL Seminar #3 - Simulations with LTSpice
• Engineering Formula Collections / Goodies
• Troubleshooting
• UT803 :: Let's get serial
• Conversions
• Noise Figure • Temp.
• Power Conversion
• AWG • Metric Conversion
• VSWR • Return Loss
• Phase Noise to Phase Jitter Converter
• misc. Calculations
• Cascaded Noise Figure
• Find parallel Resistor
• Pathloss / RSSI
• Missmatch Loss
• IP3 / SFDR Calculator
Statistics
Since July, 30, 2012
Your IP is 107.20.129.212
ec2-107-20-129-212.compute-1.a
Warning !
The calculations are all done with Javascript. You turned it off, so they do not work.
MORE INFORMATION
ขอวิศวกรผู้ยิ่งใหญ่ทรงพระเจริญ
further reading
The
ARRL Antenna book
has an interesting article about 'HF Discone Antennas' including some historical facts.
Your valuable opinion :
Avg. 4 from 121 votes.
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Info
changpuak.ch Webutation
www.changpuak.ch
\
electronics
\ calc_11.php - January 27 2013 20:29:37
Discone Antenna Calculator
min. Freq. [MHz]
Π [°]
L
s
[mm]
L
v
[mm]
C
max
[mm]
C
min
[mm]
D [mm]
S [mm]
Hint :
An interesting application note about WLAN discones (2.4 to 5 GHz) by Clemens Verstappen (DL3ETW) appeared in
FUNKAMATEUR
, 2/2013, p.156
Share your thoughts.
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