* Estimated delivery times start from the date of shipment, excluding processing time.
* Actual delivery times may vary due to holidays, weather conditions, or customs delays.
Atik retounen yo pral aksepte nan 40 jou depi dat resepsyon machandiz yo. Atik pèsonalize pa ka retounen oswa echanje. Atik achte ak yon kat kado elektwonik ka echanje sèlman; rembousman yo pa aplikab.
Kado gratis
Byenveni nan Roymall, sit entènèt pwofesyonèl ou pou achte kado depatman magazen prim. Nou valè ak apresye sipò ou, epi nou vle eksprime rekonesans nou an nan ajoute yon touche eksitasyon siplemantè nan acha ou yo. Lè w ap fè makèt avèk nou, ou pa sèlman jwenn pwodwi ki gen bon jan kalite ki amelyore fòm ou, men ou pral resevwa tou yon kado gratis eksklizif ak chak lòd ou fè. Ou pare pou eksplore koleksyon nou an epi jwenn kado pafè ou yo? Parcou seleksyon nou an nan atik depatman magazen prim, fè lòd ou, epi tann eksitasyon kado gratis ou a ki rive ansanm ak acha ou.
Règleman livrezon
Nou pral travay di pou livre atik ba ou apre resevwa lòd ou yo epi asire yo rive an sekirite. Detay livrezon yo pral bay nan imèl konfimasyon ou.Nan pifò ka, lòd yo trete nan 2 jou.Nan sikonstans espesyal, li pral retade jan sa a: Lè ou fè yon lòd samdi, dimanch oswa jou ferye, li pral retade pou 2 jou..Nòmalman, li bezwen 5-7 jou ouvrab (lendi a vandredi) san yo pa afekte pa reta vòl oswa lòt faktè anviwònman..Paske sèvis livrezon nou an se mondyal, tan livrezon yo pral depann de kote ou ye kidonk li ka bezwen kèk tan epi tanpri rete pasyan si ou nan distri oswa peyi aleka.
1. Règleman Retounen & Echanj
Nou sèlman aksepte atik achte sou roymall.com. Si ou achte nan distribitè lokal nou yo oswa lòt revandè, ou pa ka retounen yo sou bò nou.Atik lavant final oswa kado gratis yo pa akseptab pou retounen.Pou kalifye pou yon retounen, atik ou a dwe itilize epi nan menm kondisyon ke ou te resevwa li. Li dwe tou nan anbalaj orijinal la.Apre resevwa enstriksyon retounen nan men nou, tanpri anbalaje atik retounen ou yo epi depoze pake ou a nan biwo lapòs lokal la oswa yon lòt kurye. Nou pral trete atik retounen oswa echanj ou a nan 3-5 jou ouvrab apre nou resevwa li. Rembousman an pral trete ak kredite otomatikman nan metòd orijinal ou a nan peman.Pa gen retounen oswa echanj ka aksepte si pwodwi a te pwodui koutim, ki gen ladan gwosè koutim, koulè koutim, oswa enprime koutim.Bezwen plis èd, tanpri kontakte nou. service@roymall.com oswa Whatsapp: +8619359849471
2.Règleman Rembousman
Ou pral jwenn yon rembousman konplè oswa 100% kredi magazin apre nou resevwa pake retounen an epi verifye li. Rembousman an pral trete ak kredite otomatikman nan metòd orijinal ou a nan peman.Tanpri sonje ke frè livrezon ak nenpòt dwa oswa frè yo pa rembousab. Frè livrezon siplemantè yo pa rembousab yon fwa pake a te anbake. Ou responsab pou peye frè sa yo epi nou pa kapab egzante oswa rembouse yo, menm si lòd la retounen tounen vin jwenn nou.Yon fwa nou resevwa ak konfime atik retounen ou a, nou pral voye yon imèl ba ou pou fè ou konnen ke nou te resevwa atik retounen ou a. Nou pral tou fè ou konnen apwobasyon oswa rejè rembousman ou.Si ou gen nenpòt pwoblèm konsènan pwosesis rembousman an, tanpri kontakte nou. service@roymall.com oswa Whatsapp: +8619359849471
Summary:
The Triple Feed Patch Array antenna is a directional circularly polarized antenna based on the original Triple Feed Patch antenna. It uses an array of seven coupled patches, resulting in significantly higher gain. Since the beamwidth is rather narrow, this antenna is not recommended for general FPV, but for long range flight it performs very well.
Feature:
1. Good radiation efficiency.Most FR4 based patches are very efficient because FR4 is very lossy at 5.8 GHz. Also, most array antennas have higher losses in the feed network. The design uses coupling patches to keep the feed network simple and reduce these losses.
2. Very good axial ratio, not only directly perpendicular to the patch but also eccentric.
3. High gain, but not higher than theoretical gain for an array with 7 elements. This is because maximizing gain results in high side lobes and poor axial ratio.
4. Very low side lobes, almost all the energy is concentrated on the main lobe. This increases the width of the main lobe, but adds some gain.
Tips:For questions about your order, place of delivery, product discount, taxation, delivery time, warranty, shipping, payment, exchange rate, and other questions unrelated to the product, please contact customer service.
showing 1-0 of 0|
Show Original
A part of the QA has been auto-translated.
Ask a Question
1.You can contact the customer service. for any question regarding the product.
2.Ask the question in English to get answer faster.