diff --git a/autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0002-nl80211-mtk-extend-CAC-time-for-weather-radar-channe.patch b/autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0002-nl80211-mtk-extend-CAC-time-for-weather-radar-channe.patch
new file mode 100644
index 0000000..cfd0e09
--- /dev/null
+++ b/autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0002-nl80211-mtk-extend-CAC-time-for-weather-radar-channe.patch
@@ -0,0 +1,32 @@
+From dacd08119ef3964c826d1949b35c5b926b40eb2b Mon Sep 17 00:00:00 2001
+From: Shayne Chen <shayne.chen@mediatek.com>
+Date: Tue, 29 Mar 2022 16:06:30 +0800
+Subject: [PATCH 02/14] nl80211: mtk: extend CAC time for weather radar
+ channels
+
+Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
+---
+ net/wireless/nl80211.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
+index f3b2fc4..0430bbe 100644
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -9817,6 +9817,13 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
+ 	if (WARN_ON(!cac_time_ms))
+ 		cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
+ 
++	if ((dfs_region == NL80211_DFS_ETSI) &&
++	    (((chandef.width == NL80211_CHAN_WIDTH_160) &&
++	     (chandef.center_freq2 >= 5580 && chandef.center_freq2 <= 5640)) ||
++	    (chandef.center_freq1 >= 5580 && chandef.center_freq1 <= 5640)))
++		cac_time_ms = 600000;
++	pr_info("%s: region = %u, cetner freq1 = %u, center freq2 = %u, cac time ms = %u\n", __func__, dfs_region, chandef.center_freq1, chandef.center_freq2, cac_time_ms);
++
+ 	err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
+ 	if (!err) {
+ 		wdev->links[0].ap.chandef = chandef;
+-- 
+2.39.2
+