diff --git a/antennen/LoRa(WAN) airtime calculator.ods b/antennen/LoRa(WAN) airtime calculator.ods
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diff --git a/antennen/LoRa(WAN) airtime calculator.xlsx b/antennen/LoRa(WAN) airtime calculator.xlsx
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diff --git a/antennen/an-00501.pdf b/antennen/an-00501.pdf
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diff --git a/shopping_list.txt b/shopping_list.txt
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--- a/shopping_list.txt
+++ b/shopping_list.txt
@@ -11,3 +11,6 @@ Battery LiPo 3.7 V 1200 mAh 5,30 €
 
     total costs as of today, cheapest variant: 1,36 + 4,72 + 2,16 + 0,08 + 4,61 =  12,93 €
     and some cables and board
+
+Antenna for base station:
+https://de.aliexpress.com/store/product/Glass-Fiber-Antenna-Gain-8dbm-Transmission-range-is-further-LoRa-Gateway-Antenna-with-433-470-868/2805180_32852314761.html