- Dimensioning A Slot Pattern Tool
- Dimensioning A Slot Pattern Block
- Dimensioning A Slot Pattern Blocks
- Dimensioning Slot Pattern
- Antenna Theory Tutorial
Dimensioning A Slot Pattern Tool
- Antenna Basic Terms
In this video, we are going to see a trick on how to create a dimension pattern of slots controlled by references in Creo Parametric. Tips to increase Produc. . Dimensions shall be expressed to the least number of significant figures, e.g. The decimal marker shall be a bold comma, given a full letter space and placed on the baseline. Where four or more numerals are to the left or right of the decimal marker, a full space shall divide.
Every dimension must have an associated tolerance, and that tolerance must be clearly shown on the drawing. Avoid over-dimensioning a part. Double dimensioning of a feature is not permitted. Dimensions should be placed in the view which most clearly describes the feature being dimensioned. Select the dimension tool and select either and edge or centerline or circle to dimension start from and then select a parallel edge or centerline or hole to dimension to Middle Mouse Button to place. NOTE: if you select a circle Creo have a Menu Manager pop-up and it will ask you do you want to dimension to the center of the.
- Types of Antennas
- Antenna Arrays
- Wave Propagation
- Antenna Theory Useful Resources
- Selected Reading
A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center. The length of the dipole is half of the wavelength. Hence, it is called as half wave folded dipole antenna.
Frequency range
The range of frequency in which half wave folded dipole operates is around 3KHz to 300GHz. This is mostly used in television receivers.
Construction & Working of Half-wave Folded Dipole
This antenna is commonly used with the array type antennas to increase the feed resistance. The most commonly used one is with Yagi-Uda antenna. The following figure shows a half-wave folded dipole antenna.
This antenna uses an extra conducting element (a wire or a rod) when compared with previous dipole antenna. This is continued by placing few conducting elements in parallel, with insulation in-between, in array type of antennas.
The following figure explains the working of a half-wave folded dipole antenna, when it is provided with excitation.
If the diameter of the main conductor and the folded dipole are same, then there will be four folded (two times of squared one) increase in the feed impedance of the antenna. This increase in feed impedance is the main reason for the popular usage of this folded dipole antenna. Due of the twin-lead, the impedance will be around 300Ω.
Radiation Pattern
The radiation pattern of half-wave folded dipoles is the same as that of the half-wave dipole antennas. The following figure shows the radiation pattern of half-wave folded dipole antenna, which is Omni-directional pattern.
Half-wave folded dipole antennas are used where optimum power transfer is needed and where large impedances are needed.
- Antenna Arrays
- Wave Propagation
- Antenna Theory Useful Resources
- Selected Reading
A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center. The length of the dipole is half of the wavelength. Hence, it is called as half wave folded dipole antenna.
Frequency range
The range of frequency in which half wave folded dipole operates is around 3KHz to 300GHz. This is mostly used in television receivers.
Construction & Working of Half-wave Folded Dipole
This antenna is commonly used with the array type antennas to increase the feed resistance. The most commonly used one is with Yagi-Uda antenna. The following figure shows a half-wave folded dipole antenna.
This antenna uses an extra conducting element (a wire or a rod) when compared with previous dipole antenna. This is continued by placing few conducting elements in parallel, with insulation in-between, in array type of antennas.
The following figure explains the working of a half-wave folded dipole antenna, when it is provided with excitation.
If the diameter of the main conductor and the folded dipole are same, then there will be four folded (two times of squared one) increase in the feed impedance of the antenna. This increase in feed impedance is the main reason for the popular usage of this folded dipole antenna. Due of the twin-lead, the impedance will be around 300Ω.
Radiation Pattern
The radiation pattern of half-wave folded dipoles is the same as that of the half-wave dipole antennas. The following figure shows the radiation pattern of half-wave folded dipole antenna, which is Omni-directional pattern.
Half-wave folded dipole antennas are used where optimum power transfer is needed and where large impedances are needed.
This folded dipole is the main element in Yagi-Uda antenna. The following figure shows a Yagi-Uda antenna, which we will study later. The main element used here is this folded dipole, to which the antenna feed is given. This antenna has been used extensively for television reception over the last few decades.
Advantages
Dimensioning A Slot Pattern Block
The following are the advantages of half-wave folded dipole antenna −
Reception of balanced signals.
Receives a particular signal from a band of frequencies without losing the quality.
A folded dipole maximizes the signal strength.
Disadvantages
The following are the disadvantages of half-wave folded dipole antenna −
Displacement and adjustment of antenna is a hassle.
Outdoor management can be difficult when antenna size increases.
Applications
Dimensioning A Slot Pattern Blocks
The following are the applications of half-wave folded dipole antenna −
Dimensioning Slot Pattern
Mainly used as a feeder element in Yagi antenna, Parabolic antenna, turnstile antenna, log periodic antenna, phased and reflector arrays, etc.
Generally used in radio receivers.
Most commonly used in TV receiver antennas.
