Welcome to WIFI Antennas

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Admin

Broadband Dual Circularly Polarized MDAntenna

Magnetoelectric dipole antennas (MEDAs) with broad-band and symmetrical, stable unidirectional radiation pat-terns have been widely investigated and some designs for circular polarization have been reported recently. A MEDA formed by two bowtie patch antennas and two electric dipoles achieved an impedance bandwidth of 41% and a 3-dB AR bandwidth of 33% . A crossed dipole loaded with a magnetoelectric dipole can exhibit an impedance bandwidth of 60% and a 3-dB AR bandwidth of 27% . An antenna composed of two cross-placed magnetoelectric dipoles and a feeding network comprising a wideband 90degrees Schiffman phase shifter achieved a 10-dB return loss bandwidth of 85.7% and a 3-dB AR bandwidth of 61.5% . A MEDA fed by a single Γ-shaped probe attained an impedance bandwidth of 73.3% and a 3-dB AR bandwidth of 47.7% . A dual linearly polarized (LP) MEDA, excited by a power divider and a broadband 90∘ phase shifter, obtained an impedance bandwidth of 90% and a 3-dB AR bandwidth of 82% . A 60 GHz aperture coupled MEDA fed by a transverse slot etched on the broad wall of a section of shorted-end substrate integrated waveguide (SIW) showed an impedance bandwidth of 28.8% and a 3-dB AR bandwidth of 25.9% . However, these MEDA designs mentioned above are all based on single circular polarization.

 

490.jpg

Figure-7-Simulated-and-measured-SWRs-and-gains-of-the-dual-polarized-antenna.png

 

75.jpg

Share this post


Link to post
Share on other sites

,,,,these are the results of a first simulation,
impedance adjustment for 50 ohm has to be done...

ivan_01-tile.jpg

MEDA is powered by 50 ohm SMA connectors

anigif.gif

3 people like this

Share this post


Link to post
Share on other sites

,,, it is advisable to round off the corners of the patches...

ivan_01.jpg

Share this post


Link to post
Share on other sites

And yet, an ideal form would be this...

30.jpg

,,,or this...

32.jpg

Share this post


Link to post
Share on other sites

,,,by modifying the antenna geometry a wider bandwidth can be obtained...

 

screenshot_378.jpg

1 person likes this

Share this post


Link to post
Share on other sites
On 31/1/2018 at 9:10 AM, Admin said:

,,, it is advisable to round off the corners of the patches...

ivan_01.jpg

is it like that 

TDJ-X2327BKC

 in lan23...?

Share this post


Link to post
Share on other sites

is it COMPLICATED to do an 6 or 4 ARRAY (Z adapters for sure)...and how much Gain could be attained...?

 

Share this post


Link to post
Share on other sites

GAIN dBi 12-4 array ,14-6 array .

1 person likes this

Share this post


Link to post
Share on other sites

,,,it can still be so...

70.jpg

71.jpg

1 person likes this

Share this post


Link to post
Share on other sites

It looks like 4 Folded Dipoles around...?

Share this post


Link to post
Share on other sites

,,, yes, those 4 curved dipoles are for lower frequencies..and they seem to have adaptive loops on the PCB.!!!

1 person likes this

Share this post


Link to post
Share on other sites

,,,may be 1,8GHz and 2,6GHz..!!!

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now