SMA nkitahodi, Sub-Miniature Version A tiawa, yɛ radio frequency nkitahodi a ɛkorɔn-a wɔde di dwuma kɛse wɔ wireless nkitahodi mfiri mu. Ɛboa frequency transmission a ɛkɔ 18GHz, ɛhoahoa ne ho sɛ ɛyɛ impedance matching ne signal stability a ɛkyɛn so, na wɔtaa de di dwuma wɔ Wi-Fi modules, GPS antennas, ne shortwave radios mu. Esiane ne kɛse a ɛyɛ ketewaa, ɛyɛ den, ne nkitahodi a wotumi de ho to so nti, abɛyɛ akwan a wɔn a wɔn ani gye DIY radio ho no pɛ sɛ wɔde di nkitaho no mu biako.
Wɔ radio antenna nhyehyɛe a ɛwɔ asorɔkye tiawa mu no, ahotoso a ɛwɔ ntamgyinafo no mu no ho hia kɛse ma agyede a ɛyɛ pintinn a ɛfa nsɛnkyerɛnne a ɛwɔ akyirikyiri-kyirikyiri ho. Bere a wɔasɔ nkitahodi akwan pii ahwɛ akyi no, awiei koraa no wɔpaw SMA ɔbea nkitahodi a ɛwɔ anan-tokuru flange. Ɛde si dade a ɛwɔ akyi no so yiye titiriw na esiw sɛnkyerɛnne kwan so ntwitwiridii ano yiye. Saa SMAKFD4 nkitahodi yi a 4mm insulator ne nhama ahorow hyia, solders yiye a enni slippage, na square plate nhyehyɛe no ma fixing yɛ mmerɛw. Bere a wɔkyekyere nkɔnsɔnkɔnsɔn no mu den no, nhyehyɛe no nyinaa te nka sɛ egyina pintinn. Bere a wɔde abɔ antena a wɔayɛ wɔ fie no ho akyi no, sɛnea agyede no mu da hɔ no tu mpɔn kɛse; wotumi te asorɔkye tiawa gyinabea ahorow a ɛwɔ akyirikyiri mpo pefee anwummere. Wɔ wɔn a wɔn ani gye ho sɛ wɔbɛyɛ radio ahorow ho adwuma no, SMA ɔbea nkitahodi a wotumi de ho to so betumi ama adwuma no nyinaa akɔ soro ankasa.