I would like to ask how to calculate the gain of the PCB antenna

haha丶

I would like to ask how to calculate the gain of the PCB antenna [Copy link]

After reading some introductions, it said that the calculation should be compared with a point source oscillator (which does not actually exist), which I don't quite understand.

If we want to test it, do we need a special instrument? Or are the results from simulation feasible? I see that the gain unit from HFSS simulation is db, so how do we convert it to dbi?

btty038

Main technical indicators Simulation normalization

Antenna main indicators:

btty038

The antenna pattern was measured at three frequency points, 5.24 GHz, 5.28 GHz and 5.32 GHz, near the center operating frequency of the antenna. The antenna gain was measured using the standard horn comparison method. The results show that the gain of the negative permeability material microstrip antenna is improved to varying degrees at the three frequency points compared with the ordinary microstrip antenna. Among them, the gain of the antenna is most significantly improved at the center operating frequency of the antenna, 5.28 GHz, from 4.84 dBi to 7.31 dBi, an increase of 2.47 dB. At 5.28 GHz, the E-plane and H-plane radiation patterns of the antenna are shown in Figure 9. It can be seen from the figure that the 3 dB beam width of the E-plane radiation pattern shrinks from 94.07b to 72.14b, shrinking by 21.93b, and is smoother; the main lobe gain of the H-plane radiation pattern increases by 2.47 dB, but the radiation pattern deteriorates.

Jacktang

Requires special instrument testing

haha丶

btty038 posted on 2021-6-25 21:21 Select 5.24 GHz, 5.28 GHz and 5.32 GHz three frequency points near the center operating frequency of the antenna to measure the antenna's radiation pattern respectively, and use the standard...

Thank you very much for the help of the moderator. I would also like to ask whether I can test the performance of the PCB antenna I made by using a vector network analyzer to measure its return loss, bandwidth, standing wave ratio, Smith diagram, or test the communication distance of two communicating boards from different directions to judge the quality of the antenna.

haha丶

Jacktang posted on 2021-6-26 09:41 Special instrument testing is required

Thank you for your reply and help

btty038

This explanation

haha丶

btty038 posted on 2021-6-29 11:40 This explanation

Thanks a lot for your help!!!