A BEECH BONANZA PLT ENTERED PMD'S CLASS D AIRSPACE WITHOUT PERMISSION.

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ENRTE FROM CAMARILLO TO BRACKET FIELD. DUE TO POOR VISIBILITY IN LA BASIN; DECIDED TO DIVERT TO ANTELOPE VALLEY WHERE VISIBILITY WAS UNRESTR. UPON XING MOUNTAINS NBOUND; IDENTED ARPT RWY OUT R WINDOW AND INCORRECTLY THOUGHT IT WAS WJF. CONTACTED WJF TWR AFTER GETTING CURRENT ATIS AND RPTED 10 MI W; LNDG WITH ATIS. INSTRUCTED TO RPT R DOWNWIND FOR RWY 24. THERE WAS NUMEROUS ACFT INBOUND TO WJF AND 1 ACFT OUTBOUND; MY DIRECTION. MY EYES WERE FOCUSED OUTSIDE ACFT LOOKING FOR TFC. WHEN APCHING DEP END OF ASSIGNED RWY; I NOTICED RWY TO BE RWY 7. I IMMEDIATELY KNEW I WAS NOT AT WJF. AT THIS TIME; I WAS DSNDING TO PATTERN ALT OF 3150 FT AND WAS APPROX 3600 FT. PALMDALE CLASS D CEILING IS 5000 FT. I SCANNED FOR TFC OUT OF L WINDOW AND; WHEN CLR; MADE A L CLBING TURN TOWARDS WJF FIELD. AT THIS POINT; I HAD NO COM WITH WJF TWR SINCE BEING TOLD TO RPT R DOWNWIND FOR RWY 24. RADIO WAS ALWAYS TUNED TO WJF TWR ON 120.3. I THEN CALLED WJF TWR AND INFORMED CTLR THAT I HAD CONFUSED PALMDALE ARPT WITH WJF; WAS APPROX 7 MI SE; LNDG WJF. I WAS INSTRUCTED TO ENTER L BASE RWY 24. I WAS THEN CLRED TO LAND AND SUBSEQUENTLY TO TAXI TO RESTAURANT PARKING. I DEPARTED APPROX 45 MINS LATER TO RETURN TO CAMARILLO WITHOUT ANY OTHER INCIDENT. ATC AT WJF MADE NO MENTION OF MY FLT AND INTRUSION INTO PALMDALE CLASS D AIRSPACE. I DID NOT CONTACT PALMDALE ATC. I HAVE FLOWN TO WJF ARPT ON A NUMBER OF OCCASIONS ALTHOUGH NOT RECENTLY. I NORMALLY CROSS MOUNTAIN RIDGE MUCH FURTHER W OF ARPT TO ALLOW TIME TO SET-UP DSCNT; IDENTIFY ARPT AND LISTEN TO ATC FOR TFC DEPARTING WJF IN MY DIRECTION. ON THIS DATE; I MADE DECISION TO DIVERT TO ANTELOPE VALLEY MUCH FURTHER E AND CROSSED MOUNTAIN RIDGE CONSIDERABLY FURTHER E. THIS DID NOT ALLOW ME MUCH TIME TO PLAN MY ARR TO WJF; WHICH I BELIEVE CAUSED THE CONFUSION AS TO WHICH ARPT I WAS VIEWING.