To maximize the combat effectiveness of HQ-9, a dedicated FCR for HQ-9 was developed, and it is most commonly seen with HQ-9. Designated as HT-233, this radar is the most advanced FCRs HQ-9 could employ, and it has greater similarities to the MIM-104 Patriot's MPQ-53 than the S-300's 30N6 (Flap-Lid) series,[11] working in the NATO G-band (4–6 GHz) also as a search and targeting radar.