A high frequency connection adapter, comprising a dielectric coupling sleeve for the capacitive coupling of a first electrical conductor to a second electrical conductor, wherein the second electrical conductor has a conductor cavity, comprising: a first sleeve section having a first diameter, wherein a receiving space closed on one side is formed in the first sleeve section into which the first electrical conductor is insertable; and a second sleeve section having a second diameter, wherein the second diameter is smaller than the first diameter, and wherein the second sleeve section is insertable into the conductor cavity, wherein the receiving space closed on one side extends at least partly into the second sleeve section, a first high frequency connector comprising a housing and a first inner conductor arranged in a receiving section of the housing, wherein the first inner conductor is inserted into the receiving space closed on one side of the first sleeve section and wherein the first sleeve section fills at least a portion of the receiving section; a second high frequency connector having a second inner conductor, wherein the second inner conductor comprises a conductor cavity, into which the second sleeve section is inserted, wherein the second inner conductor has a first inner conductor section comprising the conductor cavity and a second inner conductor section, and a further housing and an isolating element, which galvanically isolates the second inner conductor section and the further housing, wherein the second sleeve section of the dielectric coupling sleeve is inserted into the conductor cavity, wherein the high frequency connection adapter further comprises an adapter housing and an empty space, wherein the further housing is pressed into the adapter housing. a first sleeve section having a first diameter, wherein a receiving space closed on one side is formed in the first sleeve section into which the first electrical conductor is insertable; and a second sleeve section having a second diameter, wherein the second diameter is smaller than the first diameter, and wherein the second sleeve section is insertable into the conductor cavity, wherein the receiving space closed on one side extends at least partly into the second sleeve section, a first high frequency connector comprising a housing and a first inner conductor arranged in a receiving section of the housing, wherein the first inner conductor is inserted into the receiving space closed on one side of the first sleeve section and wherein the first sleeve section fills at least a portion of the receiving section; a second high frequency connector having a second inner conductor, wherein the second inner conductor comprises a conductor cavity, into which the second sleeve section is inserted, wherein the second inner conductor has a first inner conductor section comprising the conductor cavity and a second inner conductor section, and a further housing and an isolating element, which galvanically isolates the second inner conductor section and the further housing, wherein the second sleeve section of the dielectric coupling sleeve is inserted into the conductor cavity, wherein the high frequency connection adapter further comprises an adapter housing and an empty space, wherein the further housing is pressed into the adapter housing.