Merge pull request #34 from dmitriy-konovalov/ebyte_tx_868_jk_11_868_antenna_3

Added antenna 3 measurements for EByte TX868-JK-11 (868 MHz)

Author: skobkin

README.md

@@ -7,7 +7,7 @@
 
 This repository is supposed to consist of helpful, but not exhaustive antenna measurements.
 
-Giving it's *homemade* nature, you shouldn't rely on it as a trustworthy source.
+Giving it's _homemade_ nature, you shouldn't rely on it as a trustworthy source.
 
 You can contribute to it by opening a Pull Request with your own measuremens. Here are some [guidelines and instructions](CONTRIBUTING.md).
 
@@ -18,7 +18,7 @@ You can contribute to it by opening a Pull Request with your own measuremens. He
 
 Этот репозиторий предназначен для сбора полезных, но не исчерпывающих измерений антенн.
 
-Учитывая его *кустарную* природу, вам не стоит полагаться на него как на надежный источник.
+Учитывая его _кустарную_ природу, вам не стоит полагаться на него как на надежный источник.
 
 Вы можете внести свой вклад, открыв Pull Request с вашими собственными измерениями. Вот некоторые [рекомендации и инструкции](CONTRIBUTING_RU.md).
 
@@ -38,9 +38,9 @@ Impedance: `50.2 Ω`, `j3.761`
 
 #### 868 MHz
 
-SWR: `1.354` (Antenna 1), `1.321` (Antenna 2)
+SWR: `1.354` (Antenna 1), `1.321` (Antenna 2), `1.052` (Antenna 3)
 
-Impedance: `38.09 Ω`, `j5.838` (Antenna 1), `38.74 Ω`, `j4.954` (Antenna 2)
+Impedance: `38.09 Ω`, `j5.838` (Antenna 1), `38.74 Ω`, `j4.954` (Antenna 2), `47.93 Ω`, `j1.34` (Antenna 3)
 
 ### [EByte TX868-JZ-5 (868 MHz)](antennas/ebyte_tx_868_jz_5/README.md) [`2dBi`]
 
@@ -92,7 +92,7 @@ Impedance: `53.89 Ω`, `-j37.92` (Antenna 1), `59.56 Ω`, `-j31.36` (Antenna 2)
 
 ### [ZIISOR TX868-JZ-5 (868 MHz)](antennas/ebyte_tx_868_jz_5/README.md) [`2dBi`]
 
-*Same as EByte TX868-JZ-5*
+_Same as EByte TX868-JZ-5_
 
 ## License
 

antennas/ebyte_tx_868_jk_11_868/README.md

@@ -6,12 +6,19 @@
 
 - [Ozon / Платан-Энерго](https://www.ozon.ru/product/tx868-jk-11-antenna-868mgts-2-5dbi-50om-20vt-sma-j-11sm-2235739151/)
 
+## Links
+
+- Datasheet: https://doc.platan.ru/pdf/datasheets/ebyte/TX868-JK-11.pdf
+
 ## Declared specs
 
 Gain: `2.5dBi`
 
 ## Measurements
 
+> [!IMPORTANT]
+> A total of 3 antennas was measured: antenna 1 and 2 was measured by repo owner and antenna 3 was purchased and measured by a contributor. Measurment conditions vary greatly, and the results are hard to compare.
+
 ### 868 MHz
 
 **Antenna 1:**
@@ -26,11 +33,19 @@ SWR: `1.321`
 
 Impedance: `38.74 Ω`, `j4.954`
 
+**Antenna 3:**
+
+SWR: `1.052`
+
+Impedance: `47.93 Ω`, `j1.34`
+
 <details>
 <summary>Screenshots</summary>
 
 ![Measurement at 868 MHz - Antenna 1](images/01_antenna_1.png)
 
 ![Measurement at 868 MHz - Antenna 2](images/02_antenna_2.png)
 
+![Measurement at 868 MHz - Antenna 3](images/03_antenna_3.png)
+
 </details>