Merge pull request #32 from skobkin/add_my_antennas

Adding Gizont 868 M1 (167 mm).

Author: skobkin

README.md

@@ -58,6 +58,14 @@ SWR: `1.118`
 
 Impedance: `51.33 Ω`, `j5.473 Ω`
 
+### [Gizont Nb-iot / LORA Soft Antenna M1 (167 mm, 868 MHz)](antennas/gizont_nbiot_lora_soft_antenna_m1/README.md) [`?dBi`]
+
+#### 868 MHz
+
+SWR: `1.681`
+
+Impedance: `80.24 Ω`, `-j13.86 Ω`
+
 ### [Gizont Nb-iot / LORA Soft Antenna M2 (200 mm, 868 MHz)](antennas/gizont_nbiot_lora_soft_antenna_m2/README.md) [`?dBi`]
 
 #### 868 MHz

antennas/gizont_nbiot_lora_soft_antenna_m1/README.md

@@ -0,0 +1,43 @@
+# Gizont Nb-iot / LoRa Soft Antenna M1 (167 mm, 868 MHz)
+
+![photo](images/00_photo.webp)
+
+## Where to buy
+
+- [Aliexpress / GIZONT Antenna Store](https://aliexpress.ru/item/1005007503836549.html), select "868MHz SMA M 1" option
+
+## Declared specs
+
+Gain: `10dBi` (quote from Aliexpress item page)
+
+> [!IMPORTANT]
+> The declared gain of `10dBi` is most likely fake or highly exaggerated.
+> This antenna is either an assymmetric dipole or a monopole considering it's composition. Treat this value with skepticism.
+
+## Measurements
+
+### 868 MHz
+
+SWR: `1.681`
+
+Impedance: `80.24 Ω`, `-j13.86 Ω`
+
+<details>
+<summary>Screenshot</summary>
+
+![Measurement at 868 MHz](images/01_measurement_thin.png)
+
+</details>
+
+### 868 MHz (wide view)
+
+SWR: `1.696`
+
+Impedance: <...>
+
+<details>
+<summary>Screenshot</summary>
+
+![Measurement at 868 MHz (wide view)](images/02_measurement_wide.png)
+
+</details>