diff --git a/common/config/rush/pnpm-lock.yaml b/common/config/rush/pnpm-lock.yaml
index 93a755b325..686e7bbce6 100644
--- a/common/config/rush/pnpm-lock.yaml
+++ b/common/config/rush/pnpm-lock.yaml
@@ -12,8 +12,8 @@ dependencies:
     specifier: ~3.5.2
     version: 3.5.2
   '@autorest/powershell':
-    specifier: ~4.0.700
-    version: 4.0.701
+    specifier: ~4.0.702
+    version: 4.0.702
   '@azure-tools/async-io':
     specifier: ~3.0.0
     version: 3.0.254
@@ -120,8 +120,8 @@ packages:
       vscode-jsonrpc: 3.6.2
     dev: false
 
-  /@autorest/powershell@4.0.701:
-    resolution: {integrity: sha512-qOQTu4H0SRh4vjy0PjPS21EDEydpPakHqzqWL04mPGuKjAClpzymprCBU4W7HOPoq4exkCduo9QsPtjQG+TJGg==}
+  /@autorest/powershell@4.0.702:
+    resolution: {integrity: sha512-xdRReopyjBbfKDip7Zd2MkXhm4NJsDRo+SbV30ij07/ELa9E63T5EopLSzHOwJlllq2KmGjnfn4xYU4GVySu3w==}
     engines: {node: '>=10.12.0'}
     dependencies:
       '@autorest/codemodel': 4.19.3
@@ -4366,13 +4366,13 @@ packages:
     dev: false
 
   file:projects/typespec-powershell.tgz:
-    resolution: {integrity: sha512-U1LnNGIt3E9vGwKpOxWABq+kcLYtqVWf4fx+QS/Vjvi4nglsAKIfLKgbfw8N3lCtgYIvm/GlH0/Nrzuc4EbEog==, tarball: file:projects/typespec-powershell.tgz}
+    resolution: {integrity: sha512-Ftc5CWBvHQo1T6WdjoQXqaB22R6Jvyf1/lNXu3r3+o9o4lCJECKUWoeD7lmDxCIYJMibjBXwFrW8lhD3aKYHlw==, tarball: file:projects/typespec-powershell.tgz}
     name: '@rush-temp/typespec-powershell'
     version: 0.0.0
     dependencies:
       '@autorest/codemodel': 4.19.3
       '@autorest/extension-base': 3.5.2
-      '@autorest/powershell': 4.0.701
+      '@autorest/powershell': 4.0.702
       '@azure-tools/async-io': 3.0.254
       '@azure-tools/codegen': 2.5.294
       '@azure-tools/codegen-csharp': 3.0.264
diff --git a/packages/typespec-powershell/package.json b/packages/typespec-powershell/package.json
index b1e4e14064..de0baa33fb 100644
--- a/packages/typespec-powershell/package.json
+++ b/packages/typespec-powershell/package.json
@@ -15,7 +15,7 @@
     }
   },
   "dependencies": {
-    "@autorest/powershell": "~4.0.700",
+    "@autorest/powershell": "~4.0.702",
     "@autorest/codemodel": "~4.19.3",
     "@autorest/extension-base": "~3.5.2",
     "@azure-tools/async-io": "~3.0.0",
diff --git a/packages/typespec-powershell/src/utils/modelUtils.ts b/packages/typespec-powershell/src/utils/modelUtils.ts
index d776e8de8c..a66074890f 100644
--- a/packages/typespec-powershell/src/utils/modelUtils.ts
+++ b/packages/typespec-powershell/src/utils/modelUtils.ts
@@ -190,14 +190,12 @@ export function getSchemaForType(
   typeInput: Type,
   options?: GetSchemaOptions
 ) {
-  if (schemaCache.has(typeInput)) {
-    return schemaCache.get(typeInput);
-  }
   const program = dpgContext.program;
   const { usage } = options ?? {};
-  //ToDo: by xiaogang, need to confirm whether need to add this
-  // const type = getEffectiveModelFromType(program, typeInput);
-  const type = typeInput;
+  const type = getEffectiveModelFromType(program, typeInput);
+  if (schemaCache.has(type)) {
+    return schemaCache.get(type);
+  }
   const builtinType = getSchemaForLiteral(type);
   if (builtinType !== undefined) {
     // add in description elements for types derived from primitive types (SecureString, etc.)
@@ -205,7 +203,7 @@ export function getSchemaForType(
     if (doc) {
       builtinType.description = doc;
     }
-    schemaCache.set(typeInput, builtinType);
+    schemaCache.set(type, builtinType);
     return builtinType;
   }
 
@@ -218,7 +216,7 @@ export function getSchemaForType(
       addValidation(<Schema>propertySchema, type);
       propertySchema.language.default.name = type.name;
       propertySchema.language.default.description = getDoc(program, type) || "";
-      schemaCache.set(typeInput, <Schema>propertySchema);
+      schemaCache.set(type, <Schema>propertySchema);
       return propertySchema;
     } else {
       return typeSchema;
@@ -265,25 +263,25 @@ export function getSchemaForType(
       schema.typeName = `${schema.name}`;
     }
     schema.usage = usage;
-    schemaCache.set(typeInput, schema);
+    schemaCache.set(type, schema);
     return schema;
   } else if (type.kind === "Union") {
     const schema = getSchemaForUnion(dpgContext, type, options);
     if (schema) {
-      schemaCache.set(typeInput, schema);
+      schemaCache.set(type, schema);
     }
     return schema;
   } else if (type.kind === "UnionVariant") {
     const schema = getSchemaForUnionVariant(dpgContext, type, options);
-    schemaCache.set(typeInput, schema);
+    schemaCache.set(type, schema);
     return schema;
   } else if (type.kind === "Enum") {
     const schema = getSchemaForEnum(dpgContext, type);
-    schemaCache.set(typeInput, schema);
+    schemaCache.set(type, schema);
     return schema;
   } else if (type.kind === "Scalar") {
     const schema = getSchemaForScalar(dpgContext, type, options);
-    schemaCache.set(typeInput, schema);
+    schemaCache.set(type, schema);
     return schema;
   } else if (type.kind === "EnumMember") {
     //ToDo: by xiaogang, need to confirm
@@ -321,7 +319,7 @@ export function getSchemaForType(
   return undefined;
 }
 export function getEffectiveModelFromType(program: Program, type: Type): Type {
-  if (type.kind === "Model") {
+  if (type.kind === "Model" && type.name === "") {
     const effective = getEffectiveModelType(program, type, isSchemaProperty);
     if (effective.name) {
       return effective;