One for all
Somehow it happened that in several recent projects I used various radiating elements IFA (Inverted A Antenna) as a radiating element. This workhorse is actively used in a huge number of modern wireless devices. I would like to dedicate this post to IFA species diversity.
Try the search engine to enter the magic phrase Inverted F Antenna (IFA) and you will see an incredible variety of variants of this antenna - from wired giants to planar-ceramic Lilliputians. What is the reason for such popularity?
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With the development of mobile communications, laptops, navigation terminals, wearable electronics, etc. there was a need for a compact and functional antenna that could be located on a printed circuit board, taking up (only one layer) / (minimum space), as well as being insensitive to what is located in other layers and on the reverse side of the board. One such solution was the IFA. The popularity of this solution is explained by the fact that IFA has a relatively wide operating frequency band (up to 10% of the center frequency), relatively high efficiency (ratio of radiated power to input), reaching 65%, multi-bandwidth support, small dimensions, ability to work with vertical and horizontal polarization ... The list of advantages is quite impressive. It is also necessary to add that the popularity of IFA is also related to the fact that it was studied and described in sufficient detail (in terms of the dependence of its characteristics on the geometry). If you are interested in technical details, I send to the article V.I. Slyusara " PIFA antennas for mobile communications: a variety of designs"
However, for many developers, it is the antenna made on a printed circuit board in a single technological cycle with the topology of the developed device that is of interest. And here I would like to give a few examples.
When there is a lot of space on a printed circuit board (PCB), you can make a “classic” PIFA (Printed IFA). Like for example in the images below
The appearance of the PCB with antenna
Directional pattern
True, most often you have to find ways to reduce the space occupied by the antenna. One of these methods - “ZigZag” PIFA - is set forth in a document known to many (I think so). I will illustrate ...
Board topology with ZigZag ”PIFA
Directional pattern for such a structure
And lastly, I would like to show the option of dual-band PIFA (for example, for Wi-Fi networks), a little “minimized” to reduce the space occupied.
Design Topology and PIFA Breadboard for 2.4 GHz and 5.2 GHz Bands
2.45 GHz radiation pattern
5.25 GHz radiation pattern
And this is only a small part of the total species diversity of the IFA ...
PS I was pleasantly surprised when I managed to find several interesting articles in Russian on the subject I declared on the website of V.I. Slyusara , as well as able to learn something from the book I.V. Goncharenko "Antennas HF and VHF Part 6: VHF antennas . "
Try the search engine to enter the magic phrase Inverted F Antenna (IFA) and you will see an incredible variety of variants of this antenna - from wired giants to planar-ceramic Lilliputians. What is the reason for such popularity?
')
With the development of mobile communications, laptops, navigation terminals, wearable electronics, etc. there was a need for a compact and functional antenna that could be located on a printed circuit board, taking up (only one layer) / (minimum space), as well as being insensitive to what is located in other layers and on the reverse side of the board. One such solution was the IFA. The popularity of this solution is explained by the fact that IFA has a relatively wide operating frequency band (up to 10% of the center frequency), relatively high efficiency (ratio of radiated power to input), reaching 65%, multi-bandwidth support, small dimensions, ability to work with vertical and horizontal polarization ... The list of advantages is quite impressive. It is also necessary to add that the popularity of IFA is also related to the fact that it was studied and described in sufficient detail (in terms of the dependence of its characteristics on the geometry). If you are interested in technical details, I send to the article V.I. Slyusara " PIFA antennas for mobile communications: a variety of designs"
However, for many developers, it is the antenna made on a printed circuit board in a single technological cycle with the topology of the developed device that is of interest. And here I would like to give a few examples.
When there is a lot of space on a printed circuit board (PCB), you can make a “classic” PIFA (Printed IFA). Like for example in the images below
The appearance of the PCB with antenna
Directional pattern
True, most often you have to find ways to reduce the space occupied by the antenna. One of these methods - “ZigZag” PIFA - is set forth in a document known to many (I think so). I will illustrate ...
Board topology with ZigZag ”PIFA
Directional pattern for such a structure
And lastly, I would like to show the option of dual-band PIFA (for example, for Wi-Fi networks), a little “minimized” to reduce the space occupied.
Design Topology and PIFA Breadboard for 2.4 GHz and 5.2 GHz Bands
2.45 GHz radiation pattern
5.25 GHz radiation pattern
And this is only a small part of the total species diversity of the IFA ...
PS I was pleasantly surprised when I managed to find several interesting articles in Russian on the subject I declared on the website of V.I. Slyusara , as well as able to learn something from the book I.V. Goncharenko "Antennas HF and VHF Part 6: VHF antennas . "
Source: https://habr.com/ru/post/238147/
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