Place of Origin:
TV Digital Antenna DTMB High Gain Long Range Large Yagi For Outdoor
The Working Principle Of Yagi Antenna Is As Follows (Take Three Element Antenna As An Example): The Seeker Is Slightly Shorter Than Half Of The Wavelength, The Main Oscillator Is Equal To Half Of The Wavelength, The Reflector Is Slightly Longer Than Half Of The Wavelength, And The Spacing Between The Two Oscillators Is One Fourth Of The Wavelength. At This Time, The Inductor Is "Capacitive" To The Induced Signal, And The Current Is 90 ° Ahead Of The Voltage; The Electromagnetic Wave Induced By The Inductor Will Radiate To The Main Oscillator, And The Radiated Signal Will Lag 90 ° Behind The Signal Directly Arriving At The Main Oscillator From The Air After A Quarter Wavelength Journey, Just Offsetting The "Lead" Caused By The Front, And The Two Phases Are The Same, So The Signal Superposition Is Strengthened. The Reflector Is Slightly Longer Than Half Of The Wavelength And Is Inductive. The Current Lags 90 Degrees. In Addition, It Lags 90 Degrees In The Process Of Radiation To The Main Oscillator, Which Is 180 Degrees Different From The Signal Directly Added To The Main Oscillator From The Direction Of The Reflector. If One Direction Is Strengthened And The Other Direction Is Weakened, There Will Be Strong Directionality. The Same Is True For The Launch State And The Action Process
The Use Of Yagi Antenna ?
Among The Radio Waves Of The Same Frequency In All Different Directions Arriving At The Antenna, The Radio Wave With Relatively Strong Gain And No Strong Interference Of The Same Frequency In The Adjacent Angle Is Selected And Transmitted To The Receiving Device.
The Straight Plate Machine Can Be Disassembled, And A Small Copper Wire About 10cm Long Can Be Welded At The Antenna Contact. Without Welding Tools, It Can Be Tied To The Contact Foot Of The Antenna, Stretched Out From The Casing And Fixed. Smart Machine Download A Software Called "Base Station Lock", The Local Signal Is Poor, Suggest To Buy A Mobile Phone Signal Intensifier, Cheap About 200 Yuan.
Yagi Antenna Is Really Easy To Use. It Has Good Directivity And Higher Gain Than Dipole Antenna. It Is Very Effective For Direction Finding And Long Distance Communication. If It Is Equipped With Elevation And Azimuth Rotation Control Devices, It Can Also Contact Radio Stations In All Directions, Including Spacecraft, At Will. This Feeling Is Not Available From The Vertical Antenna.
Zhangjiagang RY Electronic CO.,LTD (www.cable-antenna.com)
Founded in 2016, is focused on designing and manufacturing Cabling products and communication antennas.
It has developed a range of products including:
1. Wiring harness&Cable assembly:
Electrical wire harness, LVDS/LCD cable, power cable,USB cable,commucation cable,RF cable,Flat ribbon cable,custom cable assembly and Wire harness,etc
2. Wide variety of OEM and ODM antennas:
VHF,UHF,Wi-Fi, 3G, 4G,5G,RFID,ISM,NB-IOT,GPS,GLONASS,BEIDOU etc
"Pragmatic Integrity, Best Service", sincerely hope to cooperate with clients for a better future.
Why us ?
1. Factory sell directly
2. 1 years quality warranty
3. Samples will be shipped in 2-4 working days
4. Exchange goods without reasons within 7 days
5. Support alibaba assurance order with your money safety and your order safety
1. When can I ?
We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please call us or tell us in your email so that we will regard your inquiry priority.
2. How can I get a sample to check your quality?
After price confirmation, you can require for samples to check our quality.
3. How long can I expect to get the sample?
After you pay for the sample charge and we confirm the drawing with each other, the samples will be ready for 3-5 days. The samples will be sent to you via express and arrive in 3-5 days. You can use your own express account or prepay us if you do not have an account.
4. Can you do the design for us?
Yes. We have a professional engineer having rich experience in wire harness & cable assembly design. Just let us know your ideas and we will help to carry out your ideas into perfect products. It does not matter if you do not have someone to complete files. Tell us your detalied SPEC. of products, and we will send you finished drawing for confirmation.
5. What about the lead time for mass production?
Honestly, it depends on the order quantity and the season you place the order. The lead time of MOQ is about 10 to15 days. Generally speaking, all of the goods can be reach your address within 4 weeks.
6. What is your terms of delivery?
We are accept EXW, FOB, CIF, etc. You can choose the one which is the most convenient or most cost-effective for you.
Send your inquiry directly to us