changes to simpleAntenna messages

- This change is necessary to make simpleAntenna compatible with linkBudget

Author: OliverHasle

src/architecture/msgPayloadDefC/AntennaLogMsgPayload.h

@@ -33,6 +33,7 @@ typedef struct {
     double      P_Tx;                                  //!< [W]     Transmit power
     double      P_Rx;                                  //!< [W]     Receive power
     double      DdB;                                   //!< [dB]    Antenna directivity in decibels
+    double      eta_r;                                 //!< [-]     Antenna radiation efficiency
     double      P_N;                                   //!< [W]     Noise power at the receiver
     double      P_eirp_dB;                             //!< [W]     EIRP power transmitted
     double      G_TN;                                  //!< [dB/K]  Antenna gain over system noise temperature

src/simulation/communication/simpleAntenna/simpleAntenna.cpp

@@ -474,6 +474,7 @@ void SimpleAntenna::populateOutputMsg(AntennaLogMsgPayload *output)
     output->P_Tx           = this->P_Tx;
     output->P_Rx           = this->P_Rx;
     output->DdB            = this->DdB;
+    output->eta_r          = this->eta_r;
     output->G_TN           = this->G_TN;
     // above is just mapping
     output->P_N            = this->P_N;