HELI PLT HAS NMAC WITH DEPARTING ACR WHILE LANDING AT THE SOUTH RAMP AT MDW.

Narrative

I WAS FLYING A HELI; LNDG AT MIDWAY ON THE FBO RAMP. I WAS CLRED TO LAND AT THE FBO FROM THE W AND STAY W OF THE RWY. AS I WAS LNDG AT THE RAMP I WAS APCHING THE RWY AND AN ACR WAS ON TKOF. I WAS JUST AT THE EDGE OF THE RWY AND I MADE A L TURN TO AVOID TFC. AT THIS TIME; THE CTLR WAS DEALING WITH A BONANZA PLT WHO HAD JUST PENETRATED THE ORD INNER RING AND THOUGHT THAT HE WAS APCHING MIDWAY. THE CTLR WAS GIVING THE BONANZA A FREQ FOR ORD AND WAS DEALING WITH THE AIRSPACE VIOLATION AT THE TIME OF MY LNDG. I NEVER HEARD A TKOF CLRNC FOR THE B737. I REQUESTED FURTHER INSTRUCTIONS FROM THE TWR. THE TWR THOUGHT I WAS LNDG AT THE OTHER FBO RAMP ON THE W SIDE OF THE ARPT. I FEEL THAT THE INCIDENT OCCURRED DUE TO A CONFUSION AS TO WHICH RAMP I WAS LNDG. ALSO; I FELT THE CTLR MAY HAVE BEEN OCCUPIED BY THE BONANZA PLT WHO THOUGHT HE WAS IN MIDWAY'S AIRSPACE BUT WAS REALLY IN THE ORD CLASS B INNER RING. I'M NOT SURE IF THE CTLR WAS AWARE OF THE SERIOUSNESS OF THE SITUATION. ALSO; THE ACR CREW NEVER MENTIONED ANY CONCERN. I FELT THE ACR DEP WAS DONE IN HASTE. TFC AT MIDWAY WAS VERY LIGHT AT THE TIME. I LAND AT THE MDW FBO RAMP FREQUENTLY. THIS ISN'T THE FIRST TIME THERE WAS SOME CONFUSION BTWN THE 2 RAMPS; HOWEVER; THIS IS THE MOST SERIOUS. I ALSO FEEL THAT THE CLRNCS FOR ME AND THE ACR MAY HAVE BEEN GIVEN TOO FAR AWAY DUE TO THE LIGHT TFC.