Abstract
In this paper, an inverted F type antenna (IFA) for ZigBee communication of a sensor board has been designed and optimized, and it replaces the chip antenna on an RF (Radio Frequency) module that is not performing well enough for the ZigBee communication. The sensor board detects cattle behavior and identifies the breeding (estrus) period and transmits the data to the main station by the RF (Radio Frequency) module and IFA antenna. The proposed and optimized TRx (transmitting/receiving) IFA antenna of the ZigBee communication module has a return loss of −19 dB and a gain of 1.6 dB at 2.45 GHz. The size is about 2.5 × 0.5 cm in width and vertical length, and the height is 0.55 cm. The strength of signals with the chip antenna and the IFA antenna have been measured and compared. There is about a 20 dB enhancement with the IFA antenna compared to the chip antenna. The antenna is designed and applied to the RF transmission and reception (TRx) module. This antenna and sensor module can be applied to livestock in general as well as cattle.
Highlights
IntroductionTRx module are mounted on the mainboard to collect data from sensors installed on the body of livestock in a ranch or cage through wireless communication
PNA network analyzer, the inverted F type antenna (IFA) antenna has been built on the RF module as shown in Figures 2 and 4, and the RF module with the IFA antenna is installed on the mainboard (a) Fabricated and measurement of |S11|
The optimized IFA antenna has been measured and installed on the RF TRx module of the sensor board worn by livestock
Summary
TRx module are mounted on the mainboard to collect data from sensors installed on the body of livestock in a ranch or cage through wireless communication. The gyro sensor on the mainboard detects the movement of tenna for the RF module should be developed in consideration of the size of the case, the livestock, and the mainboard the movement data to station through the size of the mainboard, the size of transmits the RF module, and the location of the the base antenna feeding transmission and reception module with a monopole or high-gain patch antenna point.
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