Improve RX Performance - Pi4

[lamelogin]

How can I improve the Wireless RX rate that I see on my wireless router for a PI4? Maybe I need to some how add an external antenna? Is there a cheap one the board can recommend?


On the gateway I see this:

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RX Rate:  54.0 Mbit/s, 20MHz
TX Rate:  433.3 Mbit/s, 80MHz, VHT-MCS 9, VHT-NSS 1, Short GI

On the raspberry PI, I see this:

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# iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11  ESSID:"secret"
          Mode:Managed  Frequency:5.745 GHz  Access Point: mm:aa:cc:aa:dd:yy
          Bit Rate=390 Mb/s   Tx-Power=31 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-37 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

eth0      no wireless extensions.


# iw wlan0 info
Interface wlan0
        ifindex 3
        wdev 0x1
        addr mm:aa:cc:aa:dd:yy
        ssid secret
        type managed
        wiphy 0
        channel 149 (5745 MHz), width: 80 MHz, center1: 5775 MHz
        txpower 31.00 dBm

# iw wlan0 link
Connected to 60:38:e0:d0:02:a2 (on wlan0)
        SSID: secret
        freq: 5745
        RX: 252906 bytes (1227 packets)
        TX: 196643 bytes (753 packets)
        signal: -38 dBm
        rx bitrate: 433.3 MBit/s
        tx bitrate: 433.3 MBit/s

        bss flags:      short-preamble
        dtim period:    2
        beacon int:     100