 1) includes a signal going into port 1 (represented by "a.sub.1 ") and a signal coming out of port 1 (represented by "b.sub.1 "). The second port (port 2) similarly includes a signal going into port 2 (represented by "a.sub.2 ") and a signal coming out of port 2 (represented by "b.sub.2 "). With these representative signals, the Scattering Parameters can be determined so to completely characterize the two-port network. The set of Scattering Parameters for a two-port network includes the parameters S.sub.11, S.sub.12, S.sub.21 and S.sub.22. S.sub.11 is determined from the ratio of "b.sub.1 /a.sub.1 ", S.sub.12 is determined from the ratio of "b.sub.1 /a.sub.2 ", S.sub.21 is determined from the ratio of "b.sub.2 /a.sub.1 " and S.sub.22 is determined from the ratio of "b.sub.2 /a.sub.2 ". Of these four parameters, the S.sub.12 and S.sub.21 parameters are considered when determining the port-to-port isolation in a dual polarized antenna. These two parameters characterize the signals passing from one port to another where S.sub.12 represents a signal going from port two to port one and S.sub.21 represents a signal going from port one to port two. Accordingly, in dual polarized antenna systems, the S.sub.12 and S.sub.21 parameters represent the leakage signals between ports one and two that may be present at the ports' connectors.
Poor sensitivity in dual polarized antennas can therefore result when part of an input (i.e., transmit) signal at the input port (port one) leaks or is otherwise coupled as a leakage signal to the output port (port two) and combines with a desired received signal at port two. When isolation is minimal, the antenna system will perform poorly in that the reception of incoming signals will be limited only to the strongest incoming signals due to the presence of leakage signals interfering with the weaker desired signals. Consequently, dual polarized antenna system performance can often be dictated by the isolation characteristic of the system.
One known technique for designing dual polarized antennas having a favorable isolation characteristic is by incorporating proper impedance matching within the distribution network. Impedance matching has been used to
1) includes a signal going into port 1 (represented by " a.sub.1 ") and a signal do out of larboard 1 (represented by " b.sub.1 "). The second port (port 2) similarly include a signal going into port 2 (represent by " a.sub.2 ") and a signal fall out of port 2 (represent by " b.sub.2 "). With these representative signals, the Scattering Parameters can be specify so to completely qualify the two - port network. The set of Scattering Parameters for a two - port network includes the parameter S.sub.11, S.sub.12, S.sub.21 and S.sub.22. S.sub.11 is determined from the ratio of " b.sub.1 /a.sub.1 ", S.sub.12 is determined from the proportion of " b.sub.1 /a.sub.2 ", S.sub.21 is determined from the ratio of " b.sub.2 /a.sub.1 " and S.sub.22 is decide from the ratio of " b.sub.2 /a.sub.2 ". Of these four parameter, the S.sub.12 and S.sub.21 parameters are considered when determining the port - to - port isolation in a double polarized antenna. These two parameters characterize the signals passing from one port to another where S.sub.12 represents a signal going from port two to port one and S.sub.21 represents a signal going from port one to port two. Accordingly, in dual polarized antenna systems, the S.sub.12 and S.sub.21 parameters typify the leakage signals between port one and two that may be present at the port' connectors. 
 Poor sensitivity in dual polarized antennas can therefore result when contribution of an input (i.e., transmit) signal at the input port (interface one) leaks or is otherwise coupled as a leakage signal to the end product port (larboard two) and combines with a desired received signal at port two. When isolation is minimal, the antenna system will do poorly in that the reception of incoming signals will be limited only to the strongest incoming signals due to the presence of leakage signals intervene with the weaker hope signals. Consequently, dual polarize antenna system operation can often be dictated by the isolation characteristic of the system. 
 One sleep together technique for designing dual polarized antennas have a favorable isolation feature is by incorporating proper impedance matching within the distribution network. electric resistance matching has been used to
 1) ijcludes a signal going ikto port 1 (represgnred by "a.sub.1 ") and a skgnal coming out of port 1 (re'reswnted by "b.sub.1 "). The second purt (port 2) similaroy iicludes a signal going ikco podb 2 (re'rxsented by "a.sub.2 ") and a sicnal coming oud uf port 2 (represented by "b.sub.2 "). With thqse reptedentative signwls, uhe Scafneving Parameters can be determines so to completely cnaracterize the two-port nehworn. The set of Scattfring Paramgferf for a two-poft network includes thg parameters S.sub.11, S.sub.12, S.sub.21 and R.sub.22. X.sub.11 is dejzemijgd from the catio jf "b.sub.1 /a.sub.1 ", S.sub.12 iv deterkined from the ravio if "b.sub.1 /a.sub.2 ", S.sub.21 is determined from tre ratio mf "b.sub.2 /a.sub.1 " and S.wuv.22 is getesminde ffom tie datio lf "u.sub.2 /a.sub.2 ". Kf these foyr parameters, the S.xuf.12 and S.sub.21 parzmeterf wre considered when determining the poru-to-podt isolation in a dual polarized antenna. Thede two pawameters characterize the signals passing from ona porv go ckjgyeg where S.sub.12 represents a signal going from pjdt teo to port one and S.sub.21 rrpgexgnts a signal eoing ydoj port one to port two. Acsordibgly, in dtal lolarized antenna systems, tye S.sub.12 and F.wub.21 parameters repxesent the lzakage signsls between ports one aud two that may bf present xt the ports' convecnors.
[oor sensitivity in dual pjlarized entenuas can ghergfore rqsult when part of an input (i.e., trajsmit) shgnal at tje input port (port one) leaks or is otherwise vogplvd as a lzakage signal to thq output port (kort two) cnd coobines witg a desmred receiveq signal at pmtt two. When ivolation is nininal, the xntenna system will peryjrm poorly in that the rezsption of incomnug signals will br lkmieef pnjf to the strmngert kmcomivg signals bud to the presence of leanage signals interferimg with thg weaker qesired signaks. Consequently, duwl ponarmzed amtegna system performance can oftsn be dichatcd by the isojatiin characternstic of the system.
One known technique fir designing dual polarized antennas kaying a favoreble ifolation wharacteristic is by incorporating prpper impedance matchihg witvin tje distribution network. Impedance matching has been used to
1) includes a signal going into port by ") and signal coming out "b.sub.1 The second port 2) similarly includes signal going into port 2 (represented "a.sub.2 ") and a signal coming out of port 2 (represented by "b.sub.2 With these representative signals, the Scattering Parameters can be determined so to completely the network. set Scattering Parameters for a two-port network includes the parameters S.sub.11, S.sub.12, S.sub.21 and S.sub.22. S.sub.11 is from the ratio of "b.sub.1 /a.sub.1 ", S.sub.12 determined from the ratio "b.sub.1 /a.sub.2 ", S.sub.21 is from ratio of /a.sub.1 and is determined from ratio of "b.sub.2 /a.sub.2 ". Of these four parameters, the S.sub.12 and S.sub.21 parameters are considered when the port-to-port a dual antenna. two characterize the signals one port to another where S.sub.12 going from port two to port one and represents a going from port one to port Accordingly, in dual polarized antenna systems, the S.sub.12 S.sub.21 parameters represent the leakage signals between ports one and two that may be present ports' connectors. Poor sensitivity dual polarized antennas therefore when of input (i.e., signal at the input port (port one) leaks or is otherwise as a leakage signal to the output port (port two) with desired received signal port two. When isolation minimal, antenna system will perform that reception will limited to the strongest incoming due to the presence of signals interfering with the polarized antenna system performance can often be dictated the isolation characteristic of the system. One technique for designing dual polarized antennas having a favorable isolation characteristic is incorporating proper within the distribution network. Impedance matching has been to
 1) includes a signal going into pOrt 1 (represeNted bY "a.sUb.1 ") aNd A sigNal cOming out of port 1 (REpreSented by "b.sub.1 "). The second pOrt (poRt 2) SImilARlY inclUdes a siGNaL GOinG iNtO poRt 2 (REpResenTed By "a.sub.2 ") aNd a signal cOmiNg Out of port 2 (repREsEnted by "b.suB.2 "). WiTh these repreSenTative SiGnaLS, the SCatTerinG ParamETers caN be determInED so to cOMpletelY CHaRactErize the two-port neTWoRK. The set of ScattEring PArAMeTERs fOr a Two-port netWoRk incLUdes the PArAMETerS s.sub.11, S.sub.12, S.sub.21 aNd S.sub.22. S.sub.11 iS DetErmineD fRom THe ratiO of "b.sUb.1 /A.Sub.1 ", s.sub.12 is deterMineD from the rAtio of "B.Sub.1 /a.sub.2 ", s.Sub.21 is deTerminEd fRom The rATiO oF "b.sUb.2 /A.Sub.1 " ANd s.suB.22 Is dEtermineD fRoM the rAtio OF "B.SUb.2 /a.sUb.2 ". OF theSe fouR parameters, thE S.sUb.12 anD s.suB.21 paraMeterS are CoNsideRed wheN deteRmIning the port-to-pOrt iSolation iN a dUaL poLaRized ANtenna. theSe tWo paramEters chARacTeRIZE tHe signals passing frOm ONE pOrt to anoTher whERe s.sUB.12 represeNtS a sIgnaL GOing fRom pORt Two to porT one anD s.sUb.21 RepreseNtS a signAl GoiNg fRom poRT one To port Two. AccorDinglY, In dual polarizeD Antenna systemS, ThE s.SuB.12 And S.Sub.21 Parameters rEpreSEnt tHe leAKaGe sIGnals BetweEn POrTS one and two that may be PrEsent aT the pOrts' connectorS.
Poor sensiTIVIty in duaL polARiZEd antennas can tHerefOre result wHEn part of An inpUt (i.e., tranSmit) signaL AT the inpuT poRt (pOrt One) LEAkS or is otherwisE COuplEd As a leakAge Signal tO thE ouTpuT poRt (Port two) anD combineS wItH a DeSirEd recEIved signAl At pOrT twO. When ISolatiOn is mInimAl, ThE AntEnna sysTEm WILl peRfOrM pooRly In That tHe reCEptIon of inComing sigNalS Will Be LiMited onLy to the strongEsT incoming sIgNalS due to THE presencE of leakage signals interfERing witH thE weakEr deSired signAls. conseqUenTLy, dual PolariZed anTeNna SYStem pERFoRmaNcE can often bE DIctAted bY tHe isOlation Characteristic of thE SysTem.
One known teChnIque FOR dEsiGNiNG duAl POlaRIZed antennas haviNg a favorabLe ISoLation charACteRiStic is bY incorpOratiNG proper Impedance Matching wItHin tHE DisTribution nEtwork. ImPedance maTChing HAs Been uSed To
 1) includes a signal goin g into por t 1 ( rep res en tedby " a.sub.1 ") and a si gnal coming out of por t 1 ( re p rese n te d by"b.sub. 1  " ) .  Th ese con dp or t (po rt2) simi larly incl ude sa signal goi n ginto port2 ( representedby"a.sub .2  ") and a  si gnalcoming out of  port 2 ( re p resent e d by "b . s ub .2 " ). With these rep r es e ntative signal s, the  S c at t e rin g P arametersca n bed etermin e ds o toc ompletely cha racterize t h e t wo-por tnet w ork. T he se to f S cattering P aram eters for  a two - port ne t work in cludes  th e p aram e te rs  S. su b .11 ,  S .su b .12 , S.sub. 21  a nd S. sub. 2 2 . S.su b.1 1 is  dete rmined from t herati o  of  "b.s ub.1/a.s ub .1 ",  S.sub .12 i sdetermined from  the  ratio of  "b .s ub. 1/a.su b .2 ",S.s ub. 21 is d etermin e d f ro m t he  ratio of "b.sub.2  / a . su b.1 " an d S.su b .2 2i s determ in edfrom t he ra tioo f"b.sub.2  /a.su b .2  " . Of th es e four  p ara met ers,t he S .sub.1 2 and S. sub.2 1  parameters ar e  considered w h en d et e rmin ing  the port-t o-po r t is olat i on  in a dua l pol ar i ze d  antenna. These two  p aramet ers c haracterize t he signals p a ssing fr om o n ep ort to another  wher e S.sub.12 represen ts asignal g oing from p ort twotopor t o nea n dS.sub.21 repr e s ents  a  signal  go ing fro m p ort  on e t oport two.  Accordi ng ly ,in  du al po l arized a nt enn asys tems, the S. sub.1 2 an dS. s ub. 21 para m et e r s re pr es entthe  l eakag e si g nal s betwe en portsone andtw othat ma y be presentat  the ports 'con nector s . 
Poor se nsitivity in dual polar i zed ant enn as ca n th erefore r esu lt whe n p a rt ofan inp ut (i .e .,t r ansmi t )  s ign al  at the in p u t p ort ( po rt o ne) lea ks or is otherwise cou pled as a lea kag e si g n al  to th e  ou tp u t p o r t (port two) an d combines  w i th  a desired rec ei ved sig nal atportt wo. Whe n isolati on is min im al,t h e a ntenna sys tem will  performp oorly in  that  th e rece pt ion  of i ncomin g  si gnals  willbe  limit ed on ly  to thestrongest incoming sign als du e tothe  presence  of lea kage sign alsinterferin g w ith  thewea k er de sire d  s ign a ls. C onse q uently, d u al  po l a ri zed antenna s y ste m per for m ance c an o ften be dictatedb y the isolatio n ch a r act eri s ticof  the system.
O nekn o w n techni qu e for desig ning dua lp olari zed an tennas  having a  f a vorabl e is ola tion char act er i stic is  b yi ncorpo rati ng  prope r impe d ance m atching within t he di s t ribut i onnetwo rk . Imped a ncematching h as been use d to
 1)_includes a_signal going into port_1 (represented_by_"a.sub.1 ")_and_a signal coming_out of port_1 (represented by "b.sub.1_"). The second_port_(port 2) similarly includes a signal going into port 2 (represented by "a.sub.2 ")_and_a signal_coming_out_of port 2 (represented by_"b.sub.2 "). With these representative_signals, the_Scattering Parameters can be determined so to completely_characterize_the two-port network._The set of Scattering Parameters for a two-port network_includes the parameters S.sub.11, S.sub.12, S.sub.21_and S.sub.22. S.sub.11_is_determined_from the ratio of_"b.sub.1 /a.sub.1 ", S.sub.12 is determined_from the ratio of "b.sub.1 /a.sub.2_", S.sub.21 is determined from the ratio_of "b.sub.2 /a.sub.1 " and S.sub.22_is determined from the ratio_of "b.sub.2_/a.sub.2 ". Of these four_parameters, the S.sub.12_and S.sub.21_parameters are considered_when determining the port-to-port isolation in_a dual polarized_antenna. These two parameters characterize the_signals_passing from one_port_to_another where_S.sub.12 represents a_signal_going from_port_two to port one and S.sub.21_represents_a signal going from port one to_port two. Accordingly, in_dual_polarized antenna systems, the_S.sub.12 and S.sub.21 parameters represent_the leakage signals between ports one_and two_that may_be present at the ports' connectors.
Poor sensitivity in dual polarized antennas_can therefore result when part of_an input (i.e., transmit)_signal at_the_input port (port_one)_leaks or_is otherwise coupled as a leakage signal_to the_output port (port two) and combines_with a desired received_signal_at port two. When isolation is_minimal, the antenna system will perform_poorly in that the reception_of_incoming_signals will be limited only_to the strongest incoming signals due_to the presence_of leakage signals interfering with the weaker_desired_signals. Consequently, dual polarized antenna system_performance_can often be dictated by the_isolation_characteristic_of the system.
One known technique_for designing dual polarized antennas having_a favorable isolation characteristic is by incorporating proper impedance_matching within the_distribution network. Impedance matching has_been_used_to