Antenna double loop for satellite meteo

Operating frequency = 130 to 170 MHz, center frequency = 137.5 MHz, perimeter of loops = 227 cm , material used = copper or aluminum = 227x3x0.2 cm, horizontal polarization gain 3 dbd
post 21 May 2023


Antenna for UHF VHF Links

155



Meter loopThe Antenna is more or less Omni Directional and horizontally polarized.It presents a high takeoff angle and is intended for use in the 144.200mhz area

New Helix Antenna DesignGain: 15.9 dBci approximately 1 to 1.5 dB better than the standard Helix antennas I have modeled, pattern: First Side lobes at 36 degrees down 14 dB Average of all remaining sidelobes <25 dB, bandwidth: <0.2 dB variability from 432 to 438 Mhz 50 Ohm Match at <1.2 VSWR from 432 to 438 Mhz

Omni-Gain Vertical Collinear for VHF and UHFAn omnidirectional collinear, is capable of surviving harsh environments. It's a good choice for repeater installations and can be top, or side mounted to the tower

Origine et principe de l'antenne directiveSimplicity in terms of its performance, equivalence with a Yagi antenna, optimally sized, three elements with wide spaced, or four elements with close spaced

Quad 4 elementi per i 144 MhzQuad 4 elementi il guadagno da circa 5,87 dbD ad un valore prossimo ai 10 dbD,con un rapporto F/B attorno ai 20 db ed un'impedenza caratteristica di 50 ohm

Antennas_manufacturers About Rtty mode Audio Recording Amplifiers Antennas Satellite Amateur Television ATV Aprs software Beacon Band Plan Ham Radio Capitals Europe DX cluster software

Italy provices

Italia-call-ham radio Italy provices Ham Radio Clubs Italy
EME Ham Radio Satellite Grid Software Ham shirts Ham radio Magazine Log Converter Software Logs Search Services Meteor scatter Microwave Mac Ham Radio Software Practice with the soldering Propagation Solar Cycle Power Supply PMR 466Mhz Packet Radio TNC
PSK31 software Prefix World Propagation prediction Qrp low power QSL Printing QRSS Amateur VLF operating Radio old Museum Radio portal Surplus radio Sstv Photo SWL Shortwave DX Radio Telegraph Morse code VHF Activit Web SDR

Radio transceiver

Icom 706 Icom 7000 Icom 9700 Icom 7851 Kenwood TS-850 Yaesu FT 817 Yaesu FT 857 Yaesu FT100 Yaesu FT 1000mp
10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 60 m| 80 m| 160 m| 136 khz| 630 m|
Bazooka
Beverage
Cb Antenna
Collinear
Cobweb
Delta Loop
Eh
End_fed antenna
EWE Antenna
Fan Dipole
Folded Dipole
G5RV
Halo
Helix
Hentenna
Hidden Antenna
Hf mobile
HexBeam
Isotron
Jpole
Loop
Log Periodic
Low Band Receiving
Moxon
Multiband
Morgain
Ocf Fed Dipole
Quad
Slot
Spiral antenna
Vertical
Vhf-Uhf-Shf
Wifi & Ghz
Windom
Wire
Yagi
Ant.Masts and mounts
Ant.Transmatch
Antenna_Analysis
Antenna Receiving
Antennas Shortwave
Antenna Switch
Balun Calculator Antenna
Contest Logging Software
Components-kit
Duplex
Dummy load
Feed Lines
Fiberglass tubing
Phased Array
Projects Homebrew
Software Antenna
Software Defined Radio
Swr Meter System of grounding
Theory Traps Tower
Sstv Software
Logging Software
Digital_Mode
HF_radio_modifications
Interface Radio
Memory_keyers
Microphone setting
PC sound Radio Interface
Pocket Pc Preaplifiers
Radio control
RF attenuator
Radio programming
Radio Transceivers
RF Filter
Spectrum_Analyzer
Tracking satellite
Voice Messages & Keyer