Broadband Dual Circularly Polarized MDAntenna

[Admin 2540]

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.

 

 

[Admin 2540]

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

MEDA is powered by 50 ohm SMA connectors

[Admin 2540]

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

[Admin 2540]

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

,,,or this...

[starik0 9]

Красивая антенна!

[Admin 2540]

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

 

[clanon 244]

On 31/1/2018 at 9:10 AM, Admin said:

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

is it like that 

TDJ-X2327BKC

 in lan23...?

[Admin 2540]

,,,,from here...

07091876.pdf

[clanon 244]

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

 

[Admin 2540]

GAIN dBi 12-4 array ,14-6 array .

[Admin 2540]

,,,it can still be so...

[clanon 244]

It looks like 4 Folded Dipoles around...?

[Admin 2540]

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

[clanon 244]

5.8 ghz and 2.4...?

[Admin 2540]

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

[Admin 2540]

MikroTik SXT LTE6 kit... it"s 802.3af/at compliant

Details

2G Category Class12

3G Category R7 (21Mbps Downlinks, 5.76Mbps Uplink) / R8 (42.2Mbps Downlink, 5.76Mbps Uplink)

LTE Category6  (300Mbit/s Downlink, 50Mbit/s Uplink)

LTE FDD bands  1 (2100MHz) / 2 (1900MHz) / 3 (1800MHz) / 7 (2600MHz) / 8 (900 MHz) / 20 (800MHz) / 5 (850MHz) / 12 (700MHz) / 17 (700MHz) / 25 (1900MHz) / 26 (850MHz)

LTE TDD    bands38 (2600MHz) / 40 (2300MHz) / 39 (1900MHz) / 41n (2500MHz)

2G bands   2 (1900MHz) / 3 (1800MHz) / 5 (850MHz) / 8 (900MHz)

3G bands   1 (2100MHz) / 2 (1900MHz) / 5 (850MHz) / 8 (900MHz)

[Sl4va 11]

Here is a real broadband antenna. It would be reduced to a size acceptable for home use. can you reduce?

I wonder what is her gain coefficient?

 

source link

 

Edited July 17, 2020 by Sl4va
add text

[Admin 2540]

MikroTik LHG LTE6 Kit \ LDF LTE6 Kit antenna...

Mobile network

Category 2GClass 12

3G categoryR7 (link down 21 MB / s, link up 5.76 MB / s)/ R8 (link down 42.2 MB/ s, link up 5.76 MB / s)

LTE category6 (link transmitting 300 Mbps, link sending 50 Mbps)

LTE FDD bands1 (2100 MHz)/ 2 (1900 MHz)/ 3 (1800 MHz)/ 7 (2600 MHz)/ 8 (900 MHz)/ 20 (800 MHz)/ 5 (850 MHz)/ 12 (700 MHz)/ 17 (700 MHz)/ 25 (1900 MHz)/ 26 (850 MHz)

LTE TDD bands38 (2600 MHz)/ 40 (2300 MHz)/ 39 (1900 MHz)/ 41n (2500 MHz)

2G commands2 (1900 MHz)/ 3 (1800 MHz)/ 5 (850 MHz)/ 8 (900 MHz)

3G bandwidth capacity1 (2100 MHz)/ 2 (1900 MHz)/ 5 (850 MHz)/ 8 (900 MHz)

Set contentsLHG LTE6
Power supply unit 24 V, 0.38 A
Iniektor PoE
2 metal, clamp
mounting Kit K-LHG kit

 

 

[clanon 244]

On 7/17/2020 at 3:32 AM, Sl4va said:

Here is a real broadband antenna. It would be reduced to a size acceptable for home use. can you reduce?

I wonder what is her gain coefficient?

 

source link

 

Dual VIVALDIs ...with...dual cone ...diffuser...?

[AmateurRadist 6]

Any thoughts about this antenna

[Admin 2540]

Hi, did you build this antenna...???

I see that it has several types of antennas...!!!