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#3756079
Dear All, I have difficulty at choosing the optimal quasi-omni-directional antenna [compact & cheap, but good-performance at urban area: 3-5 km @ +20dBm, lowest data rate, LoRa, -148dBm rec. sensitivity] for RFM95 868 MHz transceiver module. What do you think about these two PCB trace antennas? http://www.ti.com/lit/an/swra227e/swra227e.pdf http://www.ti.com/lit/an/swra416/swra416.pdf As far as I have read & understand, (although the helical one needs accurate matching) they both have better gain parameters than these comparatively more expensive solutions: https://www.linxtechnologies.com/resources/data-guides/ant-868-jjb-xx.pdf http://www.mouser.com/catalog/specsheets/ANT-868-uSP-datasheet%20121228.pdf Another option, I may use simple wire. (What kind of wire should use?) But I have to bend it twice to make it fit to a 4x4cm case. Does it degrade the performance heavily? Thank you very much for sharing your knowledge & experience. Best regards...