If you need a new antenna for your Cradlepoint R1900, according to Taoglas either of these alternatives should work. Please review the datasheets to ensure it will work for your application.

MFR PART # |
GW.51.5153 |
DIGI-KEY PART # |
931-GW.51.5153-ND |
MANUFACTURER |
Taoglas Limited |
DESCRIPTION |
2.45GHz, 5.375GHz Wi-Fi Whip, Tilt RF Antenna 2.4GHz ~ 2.5GHz, 4.9GHz ~ 5.85GHz 3.14dBi, 6.12dBi, 3.08dBi, 3.98dBi RP-SMA Male Connector Mount |
DATASHEET |
Click Here |

MFR PART # |
MA1508.AK.001 |
DIGI-KEY PART # |
931-MA1508.AK.001-ND |
MANUFACTURER |
Taoglas Limited |
DESCRIPTION |
657.5MHz, 752MHz, 892MHz, 1.4725GHz, 1.561GHz, 1.575GHz, 1.602GHz, 1.795GHz, 1.92GHz, 2.045GHz, 2.495GHz, 2.45GHz, 3.55GHz, 5.5GHz, 5.5375GHz 4G/5G, Beidou, Galileo, GLONASS, GPS, GNSS, Wi-Fi Dome RF Antenna 617MHz ~ 698MHz, 698MHz ~ 806MHz, 824MHz ~ 960MHz, 1.427GHz ~ 1.518GHz, 1.71GHz ~ 1.88GHz, 1.85GHz ~ 1.88GHz, 1.92GHz ~ 1.99GHz, 2.3GHz ~ 2.69GHz, 2.4GHz ~ 2.5GHz, 3.3GHz ~ 3.8GHz, 5.15GHz ~ 5.85GHz, 5.15GHz ~ 5.925GHz 0.25dBi, 1.44dBi, 2.93dBi, 3.76dBi, 3.75dBic, 4.44dBic, 4.54dBic, 4.55dBi, 2.93dBi, 3.97dBi, 5.06dBi, 3.12dBi, 5.99dBi, 7.03dBi, 6.28dBi RP-SMA Male, SMA Male Panel Mount |
DATASHEET |
Click Here |