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Design Note DN008 868 MHz and 915 MHz PCB Antenna By Auden Andersen Keywords 1 CC1000 CC1010 CC1020 CC1021 CC1050 CC1070 CC1100 CC1150 PCB Antenna 868 MHz 915 MHz Monopoly Introduction This document

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This video will go over dipole antennas all these antennas here are dipole antennas now this is a 5.8 gigahertz antenna this is a 5 point 8 gigahertz antenna this is a 2.4 gigahertz antenna and this is a 433 megahertz antenna so what you notice is that as the frequency gets lower the antennas get bigger the most common dipole antennas you Zaire about half wavelength long consisting up to quarter wavelength sections configured like this another common type of dipole is called a sleeve dipole and is constructed with a coax cable with quarter wavelength of the center conductor sticking out and conductive sleeve solder to the outer conductor and fold the back over the coax to make this antenna I just took the monopoly antenna from the last video and soldered a copper wire onto the outer conductor and trimmed it to about quarter wavelength, so you see a 5.8gigahertz this antenna has an SDR about1.1 which is a pretty good match the problem with the dipole Center fed with coax cable is that we end up with coupling from the antenna to the feed line that negatively affects our radiation pattern one way to reduce this coupling is to use a type of balance called a sleeve ballot and it'basically just a fer rite bead placed near the feed point of the antenna ham radio operators constructing large antennas on the property will often feed dipole antennas with a balanced transmission line called ladder line to further reduce this coupling this 433mega Hertz dipole antenna is already pretty good match but here you can be seedy trimming it just a bit we can improve the SWR from about one point four to about 1.3 which only equates to a 1×increase in efficiency now let's talk about a topic a lot of people have trouble with antennae gain when referring to an antenna does not mean amplification like with anop-amp antenna gain is a product of the antenna efficiency and thedirectionality of the antenna when looking at antenna specifications the gain is often listed as DVI and the eyes referring to a hypothetical isotropic antenna that has a gain of 0 DVI which means that it radiates in all directions equally if not specified the listed antenna gain is the max gain of the antenna a good way to visualize antenna gain is with the stick of putty the maximum size of the stick is dependent on the power of the transmitter and the efficiency of the antenna the small piece I just cut off represents the power losses now let×39’s say we have three antennas with the same efficiency connected to the same 100 watt transmitter, but each have different radiation patterns the volume of putty for each antenna is the same first pattern represents a half wavelength dipole and is pretty ominous the middle antenna radiates most of its energy in two directions and has higher max gain than the dipole the antenna on the right has the largest max gain of these three antennas, so it can reach the farthest distance but only none direction if you want to reach longer distances you'll either have...

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What is dipole pcb antenna form?

The dipole pcb antenna form is a document used to report information about dipole pcb antennas which are a type of antenna used in PCB (Printed Circuit Board) design.

Who is required to file dipole pcb antenna form?

Any individual or company that manufactures or uses dipole pcb antennas is required to file the dipole pcb antenna form.

How to fill out dipole pcb antenna form?

To fill out the dipole pcb antenna form, you need to provide information such as the specifications of the antenna, its manufacturing process, and its intended use. The form may also require details about the manufacturer or user of the antenna.

What is the purpose of dipole pcb antenna form?

The purpose of the dipole pcb antenna form is to gather information regarding the use and manufacturing of dipole pcb antennas. This information is needed for regulatory compliance and to ensure the safe and proper use of such antennas.

What information must be reported on dipole pcb antenna form?

The dipole pcb antenna form may require information such as the dimensions and electrical characteristics of the antenna, its frequency range, materials used in its construction, and any certifications or testing conducted on the antenna.