In　this　paper,　a　numerical　comparative　study　is　presented　on　the　pentamodal　property　of　four　potential　pentamode　microstructures　(three　based　on　simple　cubic　and　one　on　body-centered　cubic　structures)　based　on　phonon　band　calculations.　The　finite-element　method　is　employed　to　calculate　the　band　structures,　and　the　two　essential　factors　of　the　ratio　of　bulk　modulus　B　to　shear　modulus　G　and　the　single-mode　band　gap　(SBG)　are　analyzed　to　quantitatively　evaluate　the　pentamodal　property.　The　results　show　that　all　four　structures　possess　a　higher　B/G　ratio　than　traditional　materials.　One　of　the　simple　cubic　structures　exhibits　the　incomplete　SBG,　while　the　three　other　structures　exhibit　complete　SBG　to　decouple　the　compression　and　shear　waves　in　all　propagation　directions.　Further　parametric　analyses　are　presented　investigating　the　effects　of　geometrical　and　material　parameters　on　the　pentamodal　property　of　these　structures.　This　study　provides　guidelines　for　the　future　design　of　novel　pentamode　microstructures　possessing　a　high　B/G　ratio　and　a　low-frequency　broadband　SBG.　Published　by　AIP　Publishing.