Single-antenna　microwave　ablation　(MWA)　is　mainly　used　to　treat　small　tumors　less　than　3　cm　in　diameter.　To　obtain　a　larger　coagulation　zone　in　a　single　ablation,　a　dual-antenna　ablation　approach　was　proposed.　A　three-dimensional　finite　element　method　(FEM)　simulation　model　of　parallel　dual-antennas　was　developed.　Ex　vivo　experiments　at　50　W　for　8　min　were　performed　to　verify　the　model.　Both　the　temperature　changes　in　tissue　and　the　size　of　the　coagulation　zone　were　recorded.　The　effects　of　dual-antenna　spacing,　heating　power,　and　blood　perfusion　on　the　coagulation　zone　were　analyzed.　Fifteen　experiments　were　carried　out.　The　errors　between　the　mean　measurements　and　simulated　results　at　the　set　temperature　points　were　1.08　degrees　C,　0.95　degrees　C,　and　2.1　degrees　C,　respectively.　For　the　same　conditions,　the　blood　perfusion　of　1.0,　1.5,　and　3.0　kg/(m(3)center　dot　s)　can　result　in　a　reduction　in　the　coagulation　volume　by　18.4%,　25.4%,　and　42.5%.　As　the　spacing　increased,　the　coagulation　zone　of　each　antenna　started　to　fuse　together　later　and　the　resulting　integral　coagulation　zone　became　larger.　Dual-antenna　MWA　is　expected　to　be　used　for　the　treatment　of　tumors　larger　than　5　cm　in　diameter.