Quazi-BowTie Antenna

[aurel 22]

Most of you know for BOW TIE antenna for TV reception..

so few days back i decided to try to build one for wi-fi 2.4.

This time i also use aluminum 1.5mm electric wire..even i can use copper wire 

just to see how work with aluminum...

anyway most of antennas are build with aluminum.

measures are standard ... distance of each element by holder is half wave L/2

size of element is full wave , angle in element is 60 deg 

[Admin 2545]

,,,good, please post the dimensions at this antenna...!!!

[aurel 22]

Dimensions are  standard for bow tie  L/2 distance from elements and L/4 until curved

[Admin 2545]

,,,well, but it is missing a size .. !!!

[aurel 22]

Yeah...it is  15mm

[Admin 2545]

,,,okay ,I will try to do a simulate with this...!!!

[Admin 2545]

and here are the results of the quasi-bowtie antenna...

 

,,,, by adding a reflector....!!!

[Hamza 43]

Wow incroyable !

[aurel 22]

WELL yes Inc-royavle ..pff incredibile 16dB with reflector and reletive easy to build!

[Erwin 0]

I want to build this antenna, so I have some questions/suggestions:

1. What is impedance of this antenna? Can it be connected directly to 50 Ohm cable?
2. What are dimensions of reflector and spacing between it and directors in simulation?
3. Length of the director's parts should be 31mm to change working frequency to 2.45 GHz.
4. If a copper wire is used, the antenna elements should be soldered together.
5. How about make simulation with straight "V" directors (each arm 61mm length, connected with angle 30 degrees)?

[Admin 2545]

1)- impedance=250-300 Ohm

2) - spacing between it and directors<<lambda/2

3)-no

4)-yes

5)-it must to be simulated

[RomanWorkshop 10]

So, I have designed my version of this antenna for 2.4 GHz (CST Studio 2020).

BowTie.cst

[spark 2]

Can you give me like this antenna for LTE  band 40 .. 2300 MHZ PLEAAS

[vova.gumerov 23]

On 04.01.2021 at 1:15 AM, RomanWorkshop said:

So, I have designed my version of this antenna for 2.4 GHz (CST Studio 2020).

BowTie.cst

Greetings, jomi. You will not show what you did, very interesting! And the main thing is agreement!

[Admin 2545]

Vova, let me understand that you want the dimensions of this antenna ... ???

[vova.gumerov 23]

36 minutes ago, Admin said:

Vova, let me understand that you want the dimensions of this antenna ... ???

I'm interested in the transition from 300Ohm to 50Ohm. But if there are sizes at 2600, I'll do it !!!!!!!!!!!!

[Admin 2545]

,,, the antenna is for 50 Ohm coax cable, these are the dimensions ... !!!

[vova.gumerov 23]

43 minutes ago, Admin said:

,,, the antenna is for 50 Ohm coax cable, these are the dimensions ... !!!

Thank you friend. Question. Is it a connector in red or can it be directly with a cable?

 

[Admin 2545]

1 minute ago, vova.gumerov said:

Thank you friend. Question. Is it a connector in red or can it be directly with a cable?

 

,,,yes...!!!

[Admin 2545]

 

,,, these are the dimensions for the 2600 MHz frequency...

,,,and *cst simulation...

[vova.gumerov 23]

Jomi dear, I almost finished the antenna from the first drawing !!!!!!!!!!!!! Now do it again !!!!!!

7 hours ago, vova.gumerov said:

Спасибо, друг. Вопрос. Это разъем красного цвета или он может быть непосредственно соединен с кабелем?

 

 

[Admin 2545]

,,,the 50 Ohm coaxial cable is mounted directly...!!!

[RomanWorkshop 10]

I changed the reflector size to 175x235 mm and parameters of my bowtie antenna for 2.4 GHz were improved:
dBi (2.442 GHz) = 15.76, S-Parameter [magnitude dB] = -36.50, VSWR = 1.03, Impedance = 48.57.

Here is project file (CST Studio 2020): BowTie v2.cst

Soon I will try to build and test this antenna with my USB wifi dongle adapter.

[clanon 246]

BALUN 1:1  if 50 ohms...needed (otherwise rf runs trough coax shield and resonance effects occur over cable shield)

Pawsey stub (3cms) INNER CONDUCTOR NOT CONNECTED! QUARTER WAVE to FR center

Edited November 22, 2021 by clanon

[RomanWorkshop 10]

Last version of my wifi bowtie antenna. Again, I increased the dimensions of the reflector to 200x260mm. This improved the parameters of the simulated antenna, presented in the images below. The prototype of this design is almost ready, I'm just waiting for a cable and connectors from China. Prepare for a big test with my wifi adapter and also I will measure the real parameters with NanoVNA-F v2. I hope this antenna will work

Project file (CST Studio 2020): BowTie v3.cst

               

Edited January 5, 2022 by RomanWorkshop