BLE的功率级别和传输距离问题

BLE有4种发射功率，4dbm,0dbm, 这两种对应的传输距离是多大，BLE5.0可以达到5dbm 这个传输距离可以达到多大，不加PA 只考虑天线的影响

如果没有匹配电路和天线，只看IC端发射出来的可以传输多远

Susan Yang：

传输距离和板子的硬件/发射功率的设置以及实际环境有关，无法给出确切的值。您现在使用的是哪个芯片？
cc2541最大功率为0dbm，理论传输距离在40m左右，cc2540最大功率为4dbm，理论最大传输距离在100m

Alvin Chen：

纠正一个问题哦.

#if defined( CC26XX ) || defined( CC13XX )
#define HCI_EXT_TX_POWER_MINUS_21_DBMLL_EXT_TX_POWER_MINUS_21_DBM//!< -21 dBm
#define HCI_EXT_TX_POWER_MINUS_18_DBMLL_EXT_TX_POWER_MINUS_18_DBM//!< -18 dBm
#define HCI_EXT_TX_POWER_MINUS_15_DBMLL_EXT_TX_POWER_MINUS_15_DBM//!< -15 dBm
#define HCI_EXT_TX_POWER_MINUS_12_DBMLL_EXT_TX_POWER_MINUS_12_DBM//!< -12 dBm
#define HCI_EXT_TX_POWER_MINUS_9_DBMLL_EXT_TX_POWER_MINUS_9_DBM//!< 9 dBm
#define HCI_EXT_TX_POWER_MINUS_6_DBMLL_EXT_TX_POWER_MINUS_6_DBM//!< 6 dBm
#define HCI_EXT_TX_POWER_MINUS_3_DBMLL_EXT_TX_POWER_MINUS_3_DBM//!< 3 dBm
#define HCI_EXT_TX_POWER_0_DBMLL_EXT_TX_POWER_0_DBM//!< 0 dBm
#define HCI_EXT_TX_POWER_1_DBMLL_EXT_TX_POWER_1_DBM//!< 1 dBm
#define HCI_EXT_TX_POWER_2_DBMLL_EXT_TX_POWER_2_DBM//!< 2 dBm
#define HCI_EXT_TX_POWER_3_DBMLL_EXT_TX_POWER_3_DBM//!< 3 dBm
#define HCI_EXT_TX_POWER_4_DBMLL_EXT_TX_POWER_4_DBM//!< 4 dBm
#define HCI_EXT_TX_POWER_5_DBMLL_EXT_TX_POWER_5_DBM//!< 5 dBm
#else // CC254x
#define HCI_EXT_TX_POWER_MINUS_23_DBMLL_EXT_TX_POWER_MINUS_23_DBM //!< -23 dBm
#define HCI_EXT_TX_POWER_MINUS_6_DBMLL_EXT_TX_POWER_MINUS_6_DBM//!< -6 dBm
#define HCI_EXT_TX_POWER_0_DBMLL_EXT_TX_POWER_0_DBM//!< 0 dBm
#define HCI_EXT_TX_POWER_4_DBMLL_EXT_TX_POWER_4_DBM//!< 4 dBm

Hank Zhang：

回复 Susan Yang:

你说的这个理论最大传输距离有加PA吗 还是只是配了天线？